Nick Jonas Sam Voice Pedro Pascal Pedro Voice Rosario Dawson Dr. Katherine Beckett Voice Lily Collins Camila Voice Aaron Taylor-Johnson Mark Voice Aubrey Plaza Dr. Rachel Wheating Voice Nicholas Braun Tim Voice Clancy Brown General Wilson Voice Mark Duplass Patrick Voice Karen Gillan Sara Voice Judy Greer Alexis Voice Paul Walter Hauser Floyd Voice Danny Huston Jack Voice Riley Keough Rose Voice Joey King Skylar Voice Stephen Lang Doctor Wheating Voice Jaeden Martell Justin Voice Paola Núñez Voice Edi Patterson Darlene Voice Danny Pudi Dr. Burman Voice Ben Schwartz Andy Voice Jennifer Tilly Mother Voice Johnny Sneed Jim Heard Actor Fede Alvarez Director, Writer Aidan Fitzgerald Writer