Mark chases a tiny fugitive inside Twayne's body. Guest starring Bobby Moynihan, Abby Elliot.

Cast: Devin Clark, Abby Elliott, Pete Holmes, Julie Klausner, Natasha Leggero, Kurt Metzger, Bobby Moynihan, Larry Murphy, Mike O'Gorman, Matt Oberg, Randy Pearlstein, Michael-Leon Wooley