The clues: In the clue video, Baby Alien notes they've been "stuck in second gear" for a while, which immediately made the judges think of the Friends theme song. There were also a few nods to Ferris Bueller's Day Off with a teacher calling out Baby Alien's name and the street parade. Theyepisode also hinted that they're a theater actor, adding that they've made appearances on the Tony award stage.
Who it could've been: There are so many possibilities for who this could be. For starters, all the Ferris Bueller's Day Off clues seem to point to Matthew Broderick, who has also won two Tony awards. Another guess from the judges was Friends actor David Schwimmer, since he actually has his own theater company. Another good guess was Freddie Prinze Jr., who was a guest star on Friends back in the day. As Ken Jeong noted, there was also a vampire stake in the clue video, which could be a reference to his wife, Buffy the Vampire Slayer actress Sarah Michelle Gellar. Since the costume is also a puppet, some popular theories are ventriloquists Jeff Dunham and Terry Fator.
Who it is: During episode four, it was revealed that Baby Alien is football player Mark Sanchez.