We love it when geek worlds collide, so the thought of seeing 'Community' star Danny Pudi (Abed!) on tonight's 'Chuck' has us all excited.

But rumor has it Pudi isn't the only member of the Greendale study group stopping by the Buy More. Which other Human Being might we see hanging around in the background of 'Chuck vs. the Hack Off'?

A few hints ...

Which 'Community' star is stopping by 'Chuck'?
*This person is pals with Zachary Levi and the 'Chuck' gang
*This person is not necessarily known for being geeky on 'Community'
*This person is a multi-tasker, always popping up in several projects at once
*This person was just visiting Pudi on the set to be nice and supportive when the 'Chuck' guys decided to turn the cameras on them as well (Zac Levi was directing)

Any guesses?

Yeah, we know that doesn't really narrow things down, but that's sort of the point. Now it's up to you eagle-eyed fans to watch tonight (Fri., Dec. 9, 8PM ET on NBC) and see what you can see.