Key to the Past Mighty Morphin Power Rangers : Season 17 Episode 25

It dawns on Dillon that the two keys to his musical pocketwatch fit together to play another tune -- the same one that Tenaya 7 whistles. Tenaya 7 is hit by memories of her past. She does some investigating on her own and finds out what really happened to her. Dillon finds out Tenaya 7 is his long lost sister.