Guest Starring: Linden Ashby (Sheriff Stalinski), Seth Gilliam (Dr. Deaton), Ryan Kelley (Deputy Parrish), Cody Christian (Theo Raeken), Khylin Rhambo (Mason), Susan Walters (Natalie Martin), Ashton Moio (Donovan), Kelsey Chow (Tracy Stewart), Victoria Moroles (Hayden Romero), Tom T. Choi (Mr. Yukimura), Michelle Clunie (BiologyTeacher), Salvator Xuereb (Mr. Stewart), Benita Robledo (Clarke), Cody Saintgnue (Brett Talbot), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)
Co-Starring: Chris Gann (Driver), Chris Jai Alex (Prison Guard)
Written By: Talia Gonzalez & Bisanne Masoud
Directed By: Russell Mulcahy
Ep: 64
Condition Terminal
Guest Starring: Melissa Ponzio (Melissa McCall), Linden Ashby (Sheriff Stalinski), Seth Gilliam (Dr. Deaton), Ryan Kelley (Deputy Parrish), Cody Christian (Theo Raeken), Khylin Rhambo (Mason), Susan Walters (Natalie Martin), Ashton Moio (Donovan), Victoria Moroles (Hayden Romero), Todd Williams (Dr. Geyer), Benita Robledo (Clarke), Michelle Clunie (Mrs. Finch), Michael Johnston (Corey), Cody Saintgnue (Brett Talbot), Eddie Ramos (Lucas), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)
Co-Starring: Claire Bryétt Andrew (Sydney), Billy Snow (Phil), Christopher Gallaher (Puppeteer)
Written By: Jeff Davis & Ian Stokes
Directed By: Bronwen Hughes
Ep: 65
A Novel Approach
Guest Starring: Cody Christian (Theo Raeken), Ashton Moio (Donovan), Steven Brand (Dr. Gabriel Valack), John Posey (Dr. Conrad Fenris), Benita Robledo (Clarke), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)
Co-Starring: Clayton Froning (Schrader)
Written By: Angela L. Harvey
Directed By: Tim Andrew
Ep: 66
Required Reading
Guest Starring: Linden Ashby (Sheriff Stalinski), Seth Gilliam (Dr. Deaton), Ryan Kelley (Deputy Parrish), Cody Christian (Theo Raeken), Khylin Rhambo (Mason), Susan Walters (Natalie Martin), Victoria Moroles (Hayden Romero), Benita Robledo (Clarke), Michelle Clunie (Mrs. Finch), Cody Saintgnue (Brett Talbot), Steele Gagnon (Young Scott), Henry Zaga (Josh), Joey Honsa (Claudia Stilinski), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)
Co-Starring: Claire Bryétt Andrew (Sydney), Marcy Goldman (Lorraine), Billy Snow (Phil)
Written By: Jeff Davis & Ian Stokes
Directed By: Alice Troughton
Ep: 67
Strange Frequencies
Guest Starring: Melissa Ponzio (Melissa McCall), Linden Ashby (Sheriff Stalinski), Ryan Kelley (Deputy Parrish), Tamlyn Tomita (Mrs. Yukimura), Cody Christian (Theo Raeken), Khylin Rhambo (Mason), Kelsey Chow (Tracy Stewart), Victoria Moroles (Hayden Romero), Tom T. Choi (Mr. Yukimura), Benita Robledo (Clarke), Michael Johnston (Corey), Henry Zaga (Josh Diaz), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)
Co-Starring: Makenna James (Theo's Sister)
Written By: Angela L. Harvey
Directed By: Russell Mulcahy
Ep: 68
Ouroboros
Guest Starring: Melissa Ponzio (Melissa McCall), Linden Ashby (Sheriff Stalinski), Seth Gilliam (Dr. Deaton), Ryan Kelley (Deputy Parrish), Tamlyn Tomita (Mrs. Yukimura), Cody Christian (Theo Raeken), Khylin Rhambo (Mason), Marisol Nichols (Desert Wolf), Victoria Moroles (Hayden Romero), Peter Katona (Vadim), Tom T. Choi (Ken Yukimura), Benita Robledo (Clarke), Ben Stillwell (Zach), Michael Johnston (Corey), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)
Written By: Will Wallace
Directed By: David Daniel
Ep: 69
Lies of Omission
Guest Starring: Linden Ashby (Sheriff Stalinski), Ryan Kelley (Deputy Parrish), Cody Christian (Theo Raeken), Khylin Rhambo (Mason), Susan Walters (Natalie Martin), Victoria Moroles (Hayden Romero), Benita Robledo (Clarke), Ben Stillwell (Zach), Michael Johnston (Corey), Lexi Ainsworth (Beth), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)
Written By: Eric Wallace
Directed By: Tim Andrew
Ep: 70
Status Asthmaticus
Guest Starring: Melissa Ponzio (Melissa McCall), Linden Ashby (Sheriff Stalinski), Ryan Kelley (Deputy Parrish), Cody Christian (Theo Raeken), Khylin Rhambo (Mason), Kelsey Chow (Tracy Stewart), Victoria Moroles (Hayden Romero), Meagan Tandy (Braeden), Benita Robledo (Clarke), Michael Johnston (Corey), Henry Zaga (Josh), Jordan Fisher (Chimera), Shannon McClung (Dispatcher Patterson), Aaron Thornton (Officer), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)
Written By: Jeff Davis & Ian Stokes
Directed By: Russell Mulcahy
Ep: 71
The Last Chimera
Guest Starring: JR Bourne (Chris Argent), Melissa Ponzio (Melissa McCall), Linden Ashby (Sheriff Stalinski), Ryan Kelley (Deputy Parrish), Cody Christian (Theo Raeken), Khylin Rhambo (Mason), Susan Walters (Natalie Martin), Kelsey Chow (Tracy Stewart), Steven Brand (Dr. Valack), Victoria Moroles (Hayden Romero), Todd Williams (Dr. Geyer), Michael Johnston (Corey), John Posey (Dr. Conrad Fenris), Benita Robledo (Clarke), Henry Zaga (Josh), Jordan Fisher (Chimera), Marti Matulis (The Surgeon), Douglas Tait (The Pathologist), Caitlin Dechelle (The Geneticist)