S03E22
The Staircase Implementation
May 17, 2010 · 20 min
8.5Cast
Johnny Galecki
Leonard Hofstadter
Jim Parsons
Sheldon Cooper
Kaley Cuoco
Penny
Simon Helberg
Howard Wolowitz
Kunal Nayyar
Rajesh Koothrappali
Carol Ann Susi
Debbie Wolowitz (voice)
Ed Lieberman
Announcer (voice)
Ally Maki
Joyce Kim
Steven Yeun
Sebastian
Ajgie Kirkland
Louie