#!/bin/bash

SEARCH_DIR='/please/fill/with/a/valid/dir'

[[ -d "${SEARCH_DIR}" ]] || exit 1

IFS=$'\n'
for folder in $(find "${SEARCH_DIR}" -mindepth 3 -type d | sort -d) ; do
	EPISODES=()
	for fle in $(find "${folder}" -type f -name 'S??E??*.mkv' | sort -d) ; do
		ep_chunk="$(grep -Eo '^S[[:digit:]]{2}E[[:digit:]]{2}' <<< "${fle##*/}")"
		for episode in "${EPISODES[@]}" ; do
			if [[ "${ep_chunk}" == "${episode}" ]] ; then
				printf '%s\n' "Found possible dupe: ${fle}"
				continue 2
			fi
		done
		EPISODES+=( "${ep_chunk}" )
	done
done