Most TV series have titles for the individual episodes. They seem to always be unique, but is this actually the case, or is there a show which have used the same title more than once?
You might think a unique title is needed to identify an episode. But they are more commonly referred to by season and episode number. They also have individual production codes.
With some shows having hundreds of episodes and with changing staff throughout the years, it seems likely that the same title could come up again eventually. Or is someone in the production responsible for making sure the title haven't been used before? Perhaps it could even be done intentionally.