diff --git a/init.sh b/init.sh
index 90e167a..60e924f 100755
--- a/init.sh
+++ b/init.sh
@@ -1,15 +1,30 @@
 #!/usr/bin/env sh
+
+CUSTOM_PYTHON=
+
+if ! which python > /dev/null; then
+	if which python3 > /dev/null; then
+		echo ">>> python not found, using python3 instead"
+		CUSTOM_PYTHON=python3
+	else
+		echo ">>> No python executable found, please install python or python3"
+		exit 1
+	fi
+fi
+
 if [ -e yt-dlc/ ]; then
-    echo ">>> youtube-dlc already downloaded, delete and redownload? [y/N]"
-    read RES
-    [ "$RES" = "y" ] || [ "$RES" = "Y" ] && rm -rf yt-dlc/
+	printf ">>> youtube-dlc already downloaded, delete and redownload? [y/N]: "
+	read RES
+	[ "$RES" = "y" ] || [ "$RES" = "Y" ] && rm -rf yt-dlc/
 fi
 if [ ! -e yt-dlc/ ]; then
-    echo ">>> Cloning youtube-dlc repo" &&
-    git clone --depth 1 --branch "2020.11.11-3" "https://github.com/blackjack4494/yt-dlc.git"
-    echo ">>> Applying patches"
-    # Allows for downloading English content from the German website
-    patch -p0 < fix-southpark-de-en.diff
+	echo ">>> Cloning youtube-dlc repo" &&
+	git clone --depth 1 --branch "2020.11.11-3" "https://github.com/blackjack4494/yt-dlc.git"
+	echo ">>> Applying patches"
+	# Allows for downloading English content from the German website
+	patch -p0 < fix-southpark-de-en.diff
 fi
 echo ">>> Building youtube-dlc"
 make -C yt-dlc/ youtube-dlc
+[ -n "$CUSTOM_PYTHON" ] &&
+	sed -i "1c\\#!/usr/bin/env $CUSTOM_PYTHON" yt-dlc/youtube-dlc
diff --git a/southpark-downloader.sh b/southpark-downloader.sh
index fea17f8..d46d7fd 100755
--- a/southpark-downloader.sh
+++ b/southpark-downloader.sh
@@ -1,233 +1,239 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
 
 source "$(dirname "$0")/config.sh"
 
 # Turn paths into absolute ones, if they aren't already. Will be necessary, since we'll change directories later.
 [ ! "${CACHEDIR::1}" = "/" ] &&
-    CACHEDIR="$(readlink -f "$(dirname "$0")/$CACHEDIR")"
+	CACHEDIR="$(readlink -f "$(dirname "$0")/$CACHEDIR")"
 [ ! "${OUTDIR::1}" = "/" ] &&
-    OUTDIR="$(readlink -f "$(dirname "$0")/$OUTDIR")"
+	OUTDIR="$(readlink -f "$(dirname "$0")/$OUTDIR")"
 [ ! "${YOUTUBE_DL::1}" = "/" ] &&
-    YOUTUBE_DL="$(readlink -f "$(dirname "$0")/$YOUTUBE_DL")"
+	YOUTUBE_DL="$(readlink -f "$(dirname "$0")/$YOUTUBE_DL")"
 
 [ ! -e "$OUTDIR" ] && mkdir -p "$OUTDIR"
 [ ! -e "$CACHEDIR" ] && mkdir -p "$CACHEDIR"
 
 p_info() {
-    echo -e "\e[32m>>> $@\e[m"
+	echo -e "\e[32m>>> $@\e[m"
 }
 
 p_error() {
-    echo -e "\e[1;31m>>> $@\e[m"
+	echo -e "\e[1;31m>>> $@\e[m"
 }
 
 usage() {
-    echo "Usage:"
-    echo "  $(basename "$0") [OPTIONS] -a                        -  Download all episodes"
-    echo "  $(basename "$0") [OPTIONS] -s <season>               -  Download all episodes of the specified season"
-    echo "  $(basename "$0") [OPTIONS] -s <season> -e <episode>  -  Download the specified episode"
-    echo "  $(basename "$0") -h                                  -  Show help page"
-    echo "Options:"
-    echo " -p                                        -  Show progress (default)"
-    echo " -P                                        -  Hide progress"
-    echo " -E                                        -  Download episodes in English (default)"
-    echo " -D                                        -  Download episodes in German"
-    echo " -u                                        -  Update episode index (default)"
-    echo " -U                                        -  Skip episode index update"
+	echo "Usage:"
+	echo "  $(basename "$0") [OPTIONS] -a                        -  Download all episodes"
+	echo "  $(basename "$0") [OPTIONS] -s <season>               -  Download all episodes of the specified season"
+	echo "  $(basename "$0") [OPTIONS] -s <season> -e <episode>  -  Download the specified episode"
+	echo "  $(basename "$0") -h                                  -  Show help page"
+	echo "Options:"
+	echo " -p                                        -  Show progress (default)"
+	echo " -P                                        -  Hide progress"
+	echo " -E                                        -  Download episodes in English (default)"
+	echo " -D                                        -  Download episodes in German"
+	echo " -u                                        -  Update episode index (default)"
+	echo " -U                                        -  Skip episode index update"
+	echo " -d                                        -  Dry run: don't download, just print out URLs"
 }
 
-unset OPT_SEASON OPT_EPISODE OPT_ALL OPT_EN OPT_LANG OPT_PROGRESS OPT_UPDATE_INDEX
+unset OPT_SEASON OPT_EPISODE OPT_ALL OPT_EN OPT_LANG OPT_PROGRESS OPT_UPDATE_INDEX OPT_DRY
 OPT_LANG="EN"
 OPT_PROGRESS=true
 OPT_UPDATE_INDEX=true
 
-while getopts "pPEDuUas:e:h" arg; do
-    case "$arg" in
-	h)
-	    usage
-	    exit 0
-	    ;;
-	s)
-	    OPT_SEASON="$OPTARG"
-	    ;;
-	e)
-	    OPT_EPISODE="$OPTARG"
-	    ;;
-	a)
-	    OPT_ALL=true
-	    ;;
-	E)
-	    OPT_LANG="EN"
-	    ;;
-	D)
-	    OPT_LANG="DE"
-	    ;;
-	p)
-	    OPT_PROGRESS=true
-	    ;;
-	P)
-	    unset OPT_PROGRESS
-	    echo hi
-	    ;;
-	u)
-	    OPT_UPDATE_INDEX=true
-	    ;;
-	U)
-	    unset OPT_UPDATE_INDEX
-	    ;;
-	?)
-	    usage
-	    exit 1
-	    ;;
-    esac
+while getopts "pPEDuUdas:e:h" arg; do
+	case "$arg" in
+		h)
+			usage
+			exit 0
+			;;
+		s)
+			OPT_SEASON="$OPTARG"
+			;;
+		e)
+			OPT_EPISODE="$OPTARG"
+			;;
+		a)
+			OPT_ALL=true
+			;;
+		E)
+			OPT_LANG="EN"
+			;;
+		D)
+			OPT_LANG="DE"
+			;;
+		p)
+			OPT_PROGRESS=true
+			;;
+		P)
+			unset OPT_PROGRESS
+			echo hi
+			;;
+		u)
+			OPT_UPDATE_INDEX=true
+			;;
+		U)
+			unset OPT_UPDATE_INDEX
+			;;
+		d)
+			OPT_DRY=true
+			;;
+		?)
+			usage
+			exit 1
+			;;
+	esac
 done
 
 if [ "$OPT_LANG" = "DE" ]; then
-    INDEX_FILENAME="$CACHEDIR/_episode_index_DE_"
-    INDEX_INITIAL_URL="https://www.southpark.de/folgen/940f8z/south-park-cartman-und-die-analsonde-staffel-1-ep-1"
-    REGEX_EPISODE_URL="\"/folgen/[0-9a-z]\+/south-park-[0-9a-z-]\+-staffel-[0-9]\+-ep-[0-9]\+\"" 
+	INDEX_FILENAME="$CACHEDIR/_episode_index_DE_"
+	INDEX_INITIAL_URL="https://www.southpark.de/folgen/940f8z/south-park-cartman-und-die-analsonde-staffel-1-ep-1"
+	REGEX_EPISODE_URL="\"/folgen/[0-9a-z]\+/south-park-[0-9a-z-]\+-staffel-[0-9]\+-ep-[0-9]\+\""
 elif [ "$OPT_LANG" = "EN" ]; then
-    INDEX_FILENAME="$CACHEDIR/_episode_index_EN_"
-    INDEX_INITIAL_URL="https://www.southpark.de/en/episodes/940f8z/south-park-cartman-gets-an-anal-probe-season-1-ep-1"
-    REGEX_EPISODE_URL="\"/en/episodes/[0-9a-z]\+/south-park-[0-9a-z-]\+-season-[0-9]\+-ep-[0-9]\+\"" 
+	INDEX_FILENAME="$CACHEDIR/_episode_index_EN_"
+	INDEX_INITIAL_URL="https://www.southpark.de/en/episodes/940f8z/south-park-cartman-gets-an-anal-probe-season-1-ep-1"
+	REGEX_EPISODE_URL="\"/en/episodes/[0-9a-z]\+/south-park-[0-9a-z-]\+-season-[0-9]\+-ep-[0-9]\+\""
 fi
 
 update_index() {
-    [ ! -e "$INDEX_FILENAME" ] && echo "$INDEX_INITIAL_URL" > "$INDEX_FILENAME"
-    echo -ne "\e[32m>>> Updating episode index\e[m"
-    while true; do
-	local URL=$(tail -n1 "$INDEX_FILENAME")
-	local NEWURLS=$(curl -s "$URL" | grep -o "$REGEX_EPISODE_URL" | tr -d "\"" | sed -E "s/^/https:\/\/www.southpark.de/g")
-	[ "$URL" = $(printf "$NEWURLS" | tail -n1) ] && break
-	echo "$NEWURLS" >> "$INDEX_FILENAME"
-	echo -ne "\e[32m.\e[m"
-    done
-    # The awk command removes duplicate lines
-    local NEW_INDEX=$(awk '!x[$0]++' "$INDEX_FILENAME")
-    printf "$NEW_INDEX" > "$INDEX_FILENAME"
-    echo
+	[ ! -e "$INDEX_FILENAME" ] && echo "$INDEX_INITIAL_URL" > "$INDEX_FILENAME"
+	echo -ne "\e[32m>>> Updating episode index\e[m"
+	while true; do
+		local URL="$(tail -n1 "$INDEX_FILENAME")"
+		local NEWURLS="$(curl -s "$URL" | grep -o "$REGEX_EPISODE_URL" | tr -d "\"" | sed -E "s/^/https:\/\/www.southpark.de/g")"
+		[ "$URL" = "$(printf "$NEWURLS" | tail -n1)" ] && break
+		echo "$NEWURLS" >> "$INDEX_FILENAME"
+		echo -ne "\e[32m.\e[m"
+	done
+	# The awk command removes duplicate lines
+	local NEW_INDEX="$(awk '!x[$0]++' "$INDEX_FILENAME")"
+	printf "$NEW_INDEX" > "$INDEX_FILENAME"
+	echo
 }
 
 # Returns all episode URLs in the specified season
 get_season() {
-    local SEASON_NUMBER="$1"
-    grep "\-${SEASON_NUMBER}-ep-[0-9]\+$" "$INDEX_FILENAME"
+	local SEASON_NUMBER="$1"
+	grep "\-${SEASON_NUMBER}-ep-[0-9]\+$" "$INDEX_FILENAME"
 }
 
 # Returns the URL of the specified episode
 get_episode() {
-    local SEASON_NUMBER="$1"
-    local EPISODE_NUMBER="$2"
-    grep "\-${SEASON_NUMBER}-ep-${EPISODE_NUMBER}$" "$INDEX_FILENAME"
+	local SEASON_NUMBER="$1"
+	local EPISODE_NUMBER="$2"
+	grep "\-${SEASON_NUMBER}-ep-${EPISODE_NUMBER}$" "$INDEX_FILENAME"
 }
 
 get_num_seasons() {
-    # Effectively searches, how many "episode 1s" there are in the index
-    grep "\-[0-9]\+-ep-1$" "$INDEX_FILENAME" | wc -l
+	# Effectively searches, how many "episode 1s" there are in the index
+	grep "\-[0-9]\+-ep-1$" "$INDEX_FILENAME" | wc -l
 }
 
 # Returns the number of episodes in the specified season
 get_num_episodes() {
-    local SEASON_NUMBER="$1"
-    get_season "$SEASON_NUMBER" | wc -l
+	local SEASON_NUMBER="$1"
+	get_season "$SEASON_NUMBER" | wc -l
 }
 
 tmp_cleanup() {
-    p_info "Cleaning up temporary files"
-    rm -rf "$TMPDIR"
+	p_info "Cleaning up temporary files"
+	rm -rf "$TMPDIR"
 }
 
 # Monitors size of downloaded video files; takes temp folder as arg
 monitor_progress() {
-    local TMP_DIR="$1"
-    while true; do
-	[ ! -e "$TMP_DIR" ] && break
-	printf " Downloaded: %s\r" $(du -bB M "$TMP_DIR" | cut -f1)
-	sleep 0.5
-    done
+	local TMP_DIR="$1"
+	while true; do
+		[ ! -e "$TMP_DIR" ] && break
+		printf " Downloaded: %s\r" "$(du -bB M "$TMP_DIR" | cut -f1)"
+		sleep 0.5
+	done
 }
 
 download_interrupt() {
-    p_info "User interrupt received"
-    tmp_cleanup
-    exit 0
+	p_info "User interrupt received"
+	tmp_cleanup
+	exit 0
 }
 
 merge_interrupt() {
-    p_info "User interrupt received"
-    tmp_cleanup
-    p_info "Cleaning up corrupted output file"
-    rm -rf "$1"
-    exit 0
+	p_info "User interrupt received"
+	tmp_cleanup
+	p_info "Cleaning up corrupted output file"
+	rm -rf "$1"
+	exit 0
 }
 
 # Takes season and episode number as arguments
 download_episode() {
-    local SEASON_NUMBER="$1"
-    local EPISODE_NUMBER="$2"
-    local OUTFILE="${OUTDIR}/South_Park_S${SEASON_NUMBER}_E${EPISODE_NUMBER}_${OPT_LANG}.mp4"
-    [ -e "$OUTFILE" ] && echo "Already downloaded Season ${SEASON_NUMBER} Episode ${EPISODE_NUMBER}" && return
-    local URL=$(get_episode "$SEASON_NUMBER" "$EPISODE_NUMBER")
-    [ -z "$URL" ] && echo "Unable to download Season ${SEASON_NUMBER} Episode ${EPISODE_NUMBER}; skipping" && return
-    p_info "Downloading Season $SEASON_NUMBER Episode $EPISODE_NUMBER ($URL)"
-    trap download_interrupt SIGINT
-    TMPDIR=$(mktemp -d "/tmp/southparkdownloader.XXXXXXXXXX")
-    [ -n "$OPT_PROGRESS" ] && monitor_progress "$TMPDIR"&
-    pushd "$TMPDIR" > /dev/null
-    if ! "$YOUTUBE_DL" "$URL" 2>/dev/null | grep --line-buffered "^\[download\]" | grep -v --line-buffered "^\[download\] Destination:"; then
-	p_info "possible youtube-dl \e[1;31mERROR\e[m"
+	local SEASON_NUMBER="$1"
+	local EPISODE_NUMBER="$2"
+	local OUTFILE="${OUTDIR}/South_Park_S${SEASON_NUMBER}_E${EPISODE_NUMBER}_${OPT_LANG}.mp4"
+	[ -e "$OUTFILE" ] && echo "Already downloaded Season ${SEASON_NUMBER} Episode ${EPISODE_NUMBER}" && return
+	local URL="$(get_episode "$SEASON_NUMBER" "$EPISODE_NUMBER")"
+	[ -z "$URL" ] && echo "Unable to download Season ${SEASON_NUMBER} Episode ${EPISODE_NUMBER}; skipping" && return
+	p_info "Downloading Season $SEASON_NUMBER Episode $EPISODE_NUMBER ($URL)"
+	if [ -z "$OPT_DRY" ]; then
+	trap download_interrupt SIGINT
+	TMPDIR="$(mktemp -d "/tmp/southparkdownloader.XXXXXXXXXX")"
+	[ -n "$OPT_PROGRESS" ] && monitor_progress "$TMPDIR"&
+	pushd "$TMPDIR" > /dev/null
+	if ! "$YOUTUBE_DL" "$URL" 2>/dev/null | grep --line-buffered "^\[download\]" | grep -v --line-buffered "^\[download\] Destination:"; then
+		p_info "possible youtube-dl \e[1;31mERROR\e[m"
+		tmp_cleanup
+		exit 1
+	fi
+	echo "[download] Merging video files"
+	trap "merge_interrupt \"$OUTFILE\"" SIGINT
+	# Remove all single quotes and dashes from video files, as they cause problems
+	for i in ./*.mp4; do mv -n "$i" "$(echo $i | tr -d \'-)"; done
+	# Find all video files and write them into the list
+	printf "file '%s'\n" ./*.mp4 > list.txt
+	# Merge video files
+	ffmpeg -safe 0 -f concat -i "list.txt" -c copy "$OUTFILE" 2>/dev/null
+	popd > /dev/null
+	trap - SIGINT
+	fi
 	tmp_cleanup
-	exit 1
-    fi
-    echo "[download] Merging video files"
-    trap "merge_interrupt \"$OUTFILE\"" SIGINT
-    # Remove all single quotes and dashes from video files, as they cause problems
-    for i in ./*.mp4; do mv -n "$i" "$(echo $i | tr -d \'-)"; done
-    # Find all video files and write them into the list
-    printf "file '%s'\n" ./*.mp4 > list.txt
-    # Merge video files
-    ffmpeg -safe 0 -f concat -i "list.txt" -c copy "$OUTFILE" 2>/dev/null
-    popd > /dev/null
-    trap - SIGINT
-    tmp_cleanup
 }
 
 # Takes season number as an argument
 download_season() {
-    local SEASON_NUMBER="$1"
-    local NUM_EPISODES=$(get_num_episodes "$SEASON_NUMBER")
-    for i in $(seq "$NUM_EPISODES"); do
-	download_episode "$SEASON_NUMBER" "$i"
-    done
+	local SEASON_NUMBER="$1"
+	local NUM_EPISODES="$(get_num_episodes "$SEASON_NUMBER")"
+	for i in $(seq "$NUM_EPISODES"); do
+		download_episode "$SEASON_NUMBER" "$i"
+	done
 }
 
 download_all() {
-    local NUM_SEASONS=$(get_num_seasons)
-    for i in $(seq "$NUM_SEASONS"); do
-	download_season "$i"
-    done
+	local NUM_SEASONS="$(get_num_seasons)"
+	for i in $(seq "$NUM_SEASONS"); do
+		download_season "$i"
+	done
 }
 
 if [ -n "$OPT_SEASON" ]; then
-    [ -n "$OPT_UPDATE_INDEX" ] && update_index
-    [ -z "$(get_season $OPT_SEASON)" ] &&
-	p_error "Unable to find Season $OPT_SEASON" &&
-	exit 1
-    if [ -n "$OPT_EPISODE" ]; then
-	[ -z "$(get_episode $OPT_SEASON $OPT_EPISODE)" ] &&
-	    p_error "Unable to find Season $OPT_SEASON Episode $OPT_EPISODE" &&
-	    exit 1
-	p_info "Going to download Season $OPT_SEASON Episode $OPT_EPISODE"
-	download_episode "$OPT_SEASON" "$OPT_EPISODE"
-    else
-	p_info "Going to download Season $OPT_SEASON"
-	download_season "$OPT_SEASON"
-    fi
+	[ -n "$OPT_UPDATE_INDEX" ] && update_index
+	[ -z "$(get_season $OPT_SEASON)" ] &&
+		p_error "Unable to find Season $OPT_SEASON" &&
+		exit 1
+	if [ -n "$OPT_EPISODE" ]; then
+		[ -z "$(get_episode $OPT_SEASON $OPT_EPISODE)" ] &&
+			p_error "Unable to find Season $OPT_SEASON Episode $OPT_EPISODE" &&
+			exit 1
+		p_info "Going to download Season $OPT_SEASON Episode $OPT_EPISODE"
+		download_episode "$OPT_SEASON" "$OPT_EPISODE"
+	else
+		p_info "Going to download Season $OPT_SEASON"
+		download_season "$OPT_SEASON"
+	fi
 elif [ -n "$OPT_ALL" ]; then
-    [ -n "$OPT_UPDATE_INDEX" ] && update_index
-    p_info "Going to download ALL episodes"
-    download_all
+	[ -n "$OPT_UPDATE_INDEX" ] && update_index
+	p_info "Going to download ALL episodes"
+	download_all
 else
-    usage
-    exit 1
+	usage
+	exit 1
 fi