Main cast •
Zachary Levi as
Agent Chuck Bartowski (24 episodes) •
Yvonne Strahovski as
Agent Sarah Walker (24 episodes) •
Adam Baldwin as
Colonel John Casey (24 episodes) •
Joshua Gomez as
Morgan Grimes (24 episodes) •
Ryan McPartlin as
Dr. Devon Woodcomb (18 episodes) •
Mark Christopher Lawrence as
Michael "Big Mike" Tucker (16 episodes) •
Scott Krinsky as Jeffrey Barnes (18 episodes) •
Vik Sahay as Lester Patel (18 episodes) •
Bonita Friedericy as
Diane Beckman (21 episodes) •
Sarah Lancaster as
Dr. Ellie Woodcomb (21 episodes)
Supporting cast •
Mekenna Melvin as Alex McHugh (12 episodes) •
Linda Hamilton as
Mary Elizabeth Bartowski (11 episodes) •
Timothy Dalton as
Alexei Volkoff (6 episodes) •
Olivia Munn,
Isaiah Mustafa,
Stacy Keibler, and
Summer Glau as "
Greta" (5 episodes) •
Lauren Cohan as
Vivian McArthur (5 episodes) •
Robin Givens as Jane Bentley (3 episodes) •
Ray Wise as
Riley (3 episodes) •
Richard Chamberlain as The Belgian (2 episodes) •
Mini Anden as Carina Miller (2 episodes) == Episodes ==