Sheldon Claims to Be Too Smart to Scare on 'The Big Bang Theory' (VIDEO)

While Leonard was struggling, and losing, in his love life, Sheldon was struggling to win the great Halloween Prank War of 2011 on 'The Big Bang Theory' (Thu., 8PM ET on CBS). Leonard, Howard and Raj started it with an elaborate prank in the halls that didn't scare Sheldon at all; only startling him a bit with a flying skeleton. But it was all a misdirection to a simple stunt of having Leonard stand behind him with a mask on. That one dropped Sheldon to the ground, and then they kept getting the upper hand on him throughout the episode.

The Big Bang Theory Sneak Peek & Photos: Halloween Episode Tonight!

The Big Bang Theory is celebrating Halloween tonight with a few old-fashioned spooky tricks. Sheldon tries to scare his friends for Halloween as payback for their own pranks against him.  But it looks like the joke's on him, because he's far more easily scared than they are. Meanwhile, when a cute comic book artist appears, Leonard and Priya's relationship is tested. Check out a sneak peek for tonight's all new episode of The Big Bang Theory below, featuring Sheldon encountering some bleeding walls, a glowing skeleton and an alien.  You can also view photos for the episode by clicking the arrows above.  Note that this episode is scheduled to run an extra minute long, so make sure to adjust your DVRs!

'The Big Bang Theory': Halloween episode preview

mw.setConfig('EmbedPlayer.EnableIpadHTMLControls', false ); mw.setConfig('Kaltura.ForceFlashOnDesktop', true ); Given a chance to scare anyone on "The Big Bang Theory," who would you pick? If you said anything other than Sheldon (Jim Parsons), you're probably telling a little bit of a fib. While you might not personally get the chance, Howard (Simon Helberg) and Raj (Kunal Nayyar) will do the dirty work for you in Thursday's (Oct. 27) Halloween episode. Of course Sheldon will do his part return the favor. In related "TBBT" news, Leonard's (Johnny Galecki) long-distance relationship with Priya faces challenges. The series airs at 8 p.m. ET....