Exclusive Sneak Peek: Three's a Crowd on 'TBBT'

It appears Raj (Kunal Nayyar) is finding it difficult to cope with Howard's (Simon Helberg) extended mission to space.

Video: Inside The 'Big Bang Theory' Wedding!

On tonight's season six premiere, things get a bit awkward when the forlorn friend makes himself a bit too comfortable for Amy's (Mayim Bialik) liking while on a romantic dinner date with Sheldon (Jim Parsons).

Watch the video above for an exclusive sneak peek at the brand-new episode!

Video: 'Big Bang Theory' Cast Celebrates 100th Episode

Don't miss Emmy-nominated Mayim and Jim tonight on the sixth season premiere of The Big Bang Theory on CBS.