Season 1 (Downfall)

Main

 * Carla Gugino as Heather Malone
 * John Stamos as Sam Clements (Eps. 1-3)
 * Billie Lourd as Kelsey Malone
 * Bex Taylor-Klaus as Leslie Malone
 * Connor Jessup as Cameron Malone
 * Bobby Campo as Adam Byers

Guest

 * Alyson Hannigan as Leigh Baxter
 * Lynn Chen as Chelsea
 * James Purefoy as Jude Steele
 * Johanna Braddy as Carmen Steele
 * Asia Argento as Wendy Steele
 * Amandla Stenberg as Lea
 * Joe Keery as Tyler
 * Nora Dunn as Jennifer West
 * Colin Ford as Joey
 * Ashley Benson as Melyssa

Episodes
" Welcome to the Party " • " Discovering the Truth " • " Them " • " Collapse " • " Time's Up " • " Prisoner " • " End of the Line "

Deaths

 * Numerous people
 * Mark (Alive)
 * Patient (Alive and Zombified)
 * Chelsea
 * Janitor (Zombified)
 * Unnamed Woman
 * Walter
 * Jeanette
 * Cindy
 * Jennifer West
 * Adam
 * Melyssa
 * Sam Clements
 * Wendy
 * Lyle
 * Greg
 * Alison Volkin
 * Jay
 * Leigh Baxter
 * Jim
 * Joey

Trivia

 * The Steele family was supposed to appear in season 2.
 * Alison Volkin, Leigh Baxter, Joey and Sam Clements were supposed to stay for the second season.