Justin Roiland Morty, Rick Voice, Executive Producer Sarah Chalke Beth Voice Spencer Grammer Summer Voice Chris Parnell Jerry Voice Matt Besser Alien Leader Guest Voice Gary Cole Alien Doctor Guest Voice Werner Herzog Shrimply Pibbles Guest Voice James Atkinson Guest Voice Maurice LaMarche Eyeholes Announcer Guest Voice Nolan North Guest Voice Ryan Ridley Guest Voice Tara Strong Guest Voice Kari Wahlgren Guest Voice Dan Harmon Executive Producer