Jake and Kevin go to the library dressed as creeps and Jake (Andy Samberg) is basically dressed as his character from The Lonely Island Feat. Nicki Minaj & John Waters: The Creep (2011).
While at the safe house Jake suggests watching his DVDs, all of which star Nicolas Cage. Samberg famously impersonated Cage many times while a cast member on Saturday Night Live (1975).
Scully says he's really good at jigsaw puzzles, in real life Joel McKinnon Miller really does love puzzles and posts pictures with finished ones on his Instagram account regularly.