Johnny Galecki

The Big Bang Theory

as Leonard Hofstadter

Episodes: 279

First Aired: Sep 24, 2007

Roseanne

as David Healy

Episodes: 92

First Aired: Oct 18, 1988

American Dreamer

as Danny Nash

Episodes: 17

First Aired: Sep 20, 1990

Billy

as David MacGregor

Episodes: 13

First Aired: Jan 31, 1992

The Conners

as David Healy

Episodes: 4

First Aired: Oct 16, 2018

Hope & Faith

as Jay

Episodes: 3

First Aired: Sep 23, 2003

American Dad!

as Arnie (voice)

Episodes: 2

First Aired: Feb 06, 2005

Blind Faith

as John Marshall

Episodes: 2

First Aired: Feb 11, 1990

Batman Beyond

as Knux (voice)

Episodes: 1

First Aired: Jan 10, 1999

Family Guy

as Leonard Hofstadter (voice)

Episodes: 1

First Aired: Jan 31, 1999

My Name Is Earl

as Scott

Episodes: 1

First Aired: Sep 20, 2005

LAX

as Leland Pressman

Episodes: 1

First Aired: Sep 13, 2004

Blossom

as Jason

Episodes: 1

First Aired: Jul 05, 1990

Civil Wars

as Greg Stolbach

Episodes: 1

First Aired: Nov 20, 1991

Boulevard of Broken Dreams

as (archive footage)

Episodes: 1

First Aired: Jan 29, 2007