In the Jan. 26 episode of the NBC comedy, Jenna (Jane Krakowski) stars in “a movie from the producers of Valentine’s Day and New Year’s Eve called Martin Luther King Day,” says Fey. “I want to lay claim to that bit before anyone gets it. It’s a movie that has everyone in the world in it.” That includes the aforementioned actors from The Help, Saturday Night Live, and Up All Night, who will be seen in a trailer for the faux film.