VIDEO: Sneak Peek - 'The Bon Voyage Reaction' on BIG BANG THEORY

On the next episode of CBS's THE BIG BANG THEORY titled 'The Bon Voyage Reaction, a new success for Leonard makes Sheldon very jealous and throws Penny for a loop.

Meanwhile, Koothrappali pushes Lucy too far in their relationship, on the sixth season finale of THE BIG BANG THEORY, Thursday, May 16 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network. Get a sneak peek below!

Leonard and Sheldon are brilliant physicists – wizards in the laboratory, but socially inept outside of it.  Enter beautiful, free-spirited neighbor, Penny, who aims to teach them a thing or two about life.  While Leonard spends his days looking for love, Sheldon is quite content video-chatting with platonic partner Amy Farrah Fowler, or playing Star Trek 3D Chess with their ever-expanding universe of friends, including fellow scientists Koothrappali and Wolowitz, and Wolowitz' new wife, the adorable microbiologist Bernadette.