Common Side Effects (TV) Cast
The cast of Common Side Effects. Updated on October 7, 2025.
20 actors
Dave King
as Marshall Cuso (voice) (10 episodes)

Dave King voices the character of Marshall Cuso.

Emily Pendergast
as Frances Applewhite (voice) (10 episodes)

Emily Pendergast voices Frances Applewhite.

Mike Judge
as Rick Kruger (voice) (10 episodes)

Mike Judge provides the voice for Rick Kruger.

Martha Kelly
as Agent Harrington (voice) (10 episodes)

Martha Kelly voices Agent Harrington.

Joseph Lee Anderson
as Agent Copano (voice) (10 episodes)

Joseph Lee Anderson voices Agent Copano.

Ben Feldman
as Nick (voice) (4 episodes)

Ben Feldman voices the character Nick.

Danny Huston
as Jonas Backstein (voice) (3 episodes)

Danny Huston lends his voice to Jonas Backstein.

Sydney Tamiia Poitier
as Cecily (voice) (4 episodes)

Sydney Tamiia Poitier voices Cecily.

Shalita Grant
as Susan (voice) (2 episodes)

Shalita Grant voices Susan and a Female DEA Agent.

Alan Resnick
as Zane (voice) (1 episode)

Alan Resnick voices the character Zane.

Shannon Woodward
as Amelia (voice) (2 episodes)

Shannon Woodward provides the voice for Diane.

Andy Daly
as Mysterious Passenger (voice) (1 episode)
Bob Stephenson
as Connor (voice) (1 episode)
Sue Rose
as Hildy (voice) (5 episodes)
Timothy Simons
as Lawyer (voice) (1 episode)
Lin Shaye
as Sonia (voice) (3 episodes)
Steve Hely
as Rusty (voice) (3 episodes)
Nicolas Cantu
as Tommy (voice) (1 episode)
Jon Foor
as Hoang (voice) (1 episode)
Christine Ko
as Kiki (voice) (1 episode)
For the best insights and data about the TV show Common Side Effects, visit our main Common Side Effects page.