Johnny Galecki

as Mark · 1 episode

as Alex

as Henry Montgomery

as David Healy · 4 episodes

as Paul Berger

as Gabriel Brown

as Terry Ork

as Borel

as Ted

as Jeremy

as Leonard Hofstadter · 279 episodes

as Scott · 1 episode

as Arnie (voice) · 1 episode

as Miles (uncredited)

as Leland Pressman · 1 episode

as Johnny Galecki · 3 episodes

as Barry

as Jay · 3 episodes

as Jude

as Peter Brown

as Darcy

as Seth

as Arthur

as Dale Stackhouse · 2 episodes

as Leonard Hofstadter (voice) · 1 episode

as Knux (voice) · 1 episode

as Jason Bock

as Max Neurick

as Ira Reder

as Stingo Wheelie

as Teddy McNair

as Marty

as Daniel Hannigan

as David MacGregor · 13 episodes

as Greg Stolbach · 1 episode

as Tim Seavers

as Eric

as Danny Nash · 17 episodes

as Jason · 1 episode

as John Marshall · 2 episodes

as Rusty Griswold

as Billy Quinn

1 episode

as David Healy · 92 episodes

as Toby Reardon

as Doug Rule

Executive Producer

Producer