Guest Stars Chris Gauthier as Vincent Tembi Locke as Grace Monroe Christopher Jacot as Larry Haberman Kavan Smith as Andy 2.0 Felicia Day as Holly Marten Wil Wheaton as Isaac Parrish Peter Brown as Med Technician Jordenn Thompson as Jenna Stark Ileeya Brown as Jenna Stark Roger Cross as Major William Shaw Geoff Gustafson as Dr. Tuchman Elizabeth Thai as Dr. Yoo Jason Poulsen as Dr. Wells Leo Chiang as NPC Guard Nathan Lehfeldt as DOD Attaché