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CBS Celebrity Spotlight
Johnny Galecki
as Leonard
Johnny Galecki is best known to television audiences for his role as David in the long-running comedy series "Roseanne," for which he...
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Best Leonard Videos
B. B. Theory has 1165 Fans
Video Clips: Best of Sheldon
Behind the Scenes
Season 2: Episode 00
Take a behind the scenes look.
In the Spotlight
Season 2: Episode 00
Discover what influenced Jim Parsons.
We Need To Talk
Season 2: Episode 10
Leonard tries to tell Stephanie he wants her to move out.
Rock, Paper, Scissors, Lizard
Season 2: Episode 8
The guys have an interesting way of settling their disputes.
Disastrous Play
Season 2: Episode 4
Raj gets a big head and makes a play for Penny.
Chosen by Science
Season 2: Episode 3
Sheldon attempts to set Penny up for online dating.
Next on Big Bang Theory
January 12, 8:00pm et/pt
The Killer Robot Instability: The guys are excited about building a "killer" robot.