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Episode 21: Chuck Versus the Colonel; 4/20/09 4/1/09: CHUCK AND SARAH RISK EVERYTHING TO FIND CHUCK'S FATHER. When Chuck and Sarah go AWOL to rescue Chuck's father Steve (guest star Scott Bakula), they discover that spending time together without any surveillance allows for unchartered chemistry. But as the two get closer, Casey zeroes in on their hidden location. Meanwhile, Morgan becomes the pariah of the Buy More after mistakenly getting Emmett (guest star Tony Hale) promoted. From NBC 3/8/09: Added episode title. From SpoilerTV
