Johnny Galecki
Leonard Hofstadter (24 eps)
Jim Parsons
Sheldon Cooper (24 eps)
Kaley Cuoco
Penny (24 eps)
Simon Helberg
Howard Wolowitz (24 eps)
Kunal Nayyar
Rajesh Koothrappali (24 eps)
Melissa Rauch
Bernadette Rostenkowski (24 eps)
Mayim Bialik
Amy Farrah Fowler (24 eps)
Kevin Sussman
Stuart Bloom (10 eps)
Alessandra Torresani
Claire (4 eps)
Stephen Merchant
Dave Gibbs (3 eps)
Wil Wheaton
Wil Wheaton (3 eps)
Christine Baranski
Beverly Hofstadter (3 eps)
Jim Meskimen
Minister (1 eps)
Louise Claps
Receptionist (1 eps)
Melissa Tang
Mandy Chao (1 eps)
Craig Welzbacher
Candidate #1 (1 eps)
Kurt Koehler
Candidate #2 (1 eps)
Arshad Aslam
Candidate #3 (1 eps)
Megan Heyn
Natalie (1 eps)
Patrika Darbo
Grace (1 eps)
Rebecca Ann Johnson
Attractive Red Head (1 eps)
Michael Rapaport
Kenny Fitzgerald (1 eps)
Elena Campbell-Martinez
Maria (1 eps)
Adam Nimoy
Self (1 eps)
Elon Musk
Elon Musk (1 eps)
Wayne Wilderson
Travis (1 eps)
Yoshi Barrigas
Trent Monaco (1 eps)
Jane Kaczmarek
Dr. Gallow (1 eps)
June Squibb
Connie Tucker (1 eps)
Adam West
Self (1 eps)
Creagen Dow
Glenn the Maitre D' (1 eps)
Shane Blades
Customer (1 eps)
Jim Holmes
Tim (1 eps)
Michael Croner
Andre (1 eps)
Judd Hirsch
Alfred Hofstadter (1 eps)
Blake Anderson
Trevor (1 eps)
Casey Sander
Mike Rostenkowski (1 eps)
Marcus Folmar
Police Officer (1 eps)
Jeff Witzke
Moviegoer (voice) (1 eps)
Amanda Payton
Ainsley (1 eps)
Keith Carradine
Wyatt Teller (1 eps)
Lio Tipton
Vanessa Bennett (1 eps)
Bob Newhart
Arthur Jeffries (1 eps)
Declan Churchill Carter
Five Year Old (1 eps)
Brian Thomas Smith
Zack Johnson (1 eps)
Stephen Hawking
Stephen Hawking (1 eps)