I can’t remember the last time I posted, but I just needed to contribute to this thread!
I started reading this ‘Who Is Doctor Whale’ thread probably about an hour ago and I have read every post word for word and I just want to say… you all are AMAZING 😀
When I first heard the Frankie theory, I was a bit hesitant to commit… granted I was sold on Peter Pan (though I may have been biased as I love the character so much and I want nothing more than to see him on my favorite TV show 😆 ). But then the evidence just kept piling up and the more I read the more the theory made sense. There are so many links that I am not even sure what other characters to start to theorize about because this is such a strong argument.
I am now sold on the Frankie theory 
Episode 5 cannot come soon enough!