Agent John Casey (born Alexander Coburn) works for the NSA. His cover is working at the Buy More with Chuck. He also has an apparent weakness for pretty red-headed spies.While he has often criticized Chuck over the first two seasons with Chuck's new found abilities through the intersect Casey is showing signs that he actually is becoming impressed with Chuck... which apparently is no small deal.One of Casey's hobbies is growing and tending to a bonsai tree. He's also got true respect for an old president of the U.S.A. , Ronald Reagan, which shows in several episodes.