This is not just that but an observation too……Every person in Storybrooke has day to day or meet and interact with each other also appear together in FTL. Snow’s story has Charming, Regina, Rumple, Grumpy Cinderella etc. so their Storybrooke counterparts also have a relationship of some sort. Dr. Whale not has interacted with MMB but seems to have had a 1 night stand, was David’s doctor and is under Regina’s thumb. The conclusion that I am coming to is that he must fit into Snow’s story or Regina’s story. There is still more to tell of Regina’s FTL story and I cannot see Snow having any other guy in FTL exept Charming. Red seems to also fit into this part of the puzzle of who Dr. Whale is. It is possible he is part of the Little Mermaid story and somehow Snow, Charming and company fit into the story. Cinderella and Snow did meet in FTL so maybe Snow and Ariel are friends too.