Try 30 days of free premium.

The Celebration Experimentation

After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest.

Try 30 days of free premium.

Guest Cast

View full cast list »

Cast Appearances

View full appearance list »

Episode Discussion

gmpugs posted 8 years ago

"Happy Birthday, Sherman!" Poor Sheldon, Batman can't get his name right. :P

Login to leave a comment on this episode.
Try 30 days of free premium.