Episode 310 Spoilers: Chuck vs. the Tic Tac; 3/15/2010
3/7/10: There are "three major reveals" about Casey.
From Ausiello
3/7/10: CHUCK AND SARAH MUST CLEAR CASEY'S GOOD NAME. Casey carries out a side mission for his old commanding officer James Keller (Guest star Robert Patrick) that leads to him committing treason. When Chuck learns the dark truth about Colonel Keller, he and Sarah set out to break Casey out of jail and clear his name. Meanwhile, Awesome's plan to keep Ellie out of danger gets more difficult when she gets her dream fellowship.
From NBC
1/13/10: "Casey does something bad. REALLY bad. Could-cost-him-his-job bad. And it's connected to [Colonel Keller].
From Ausiello
1/13/10: Robert Patrick has been cast as Colonel Keller.
From Ausiello
1/13/10: Guest characters: COLONEL JAMES KELLER - 55, but needs to be able to play younger in flashbacks. Military man for life, yet relatable and casual despite his rank. GUEST STAR. All ethnicities; STANLEY FITZROY - Mid 30's. Shockingly short, but not a little person. Total geek. GUEST STAR (possibly one day guest star). All ethnicities; KATHLEEN MCHUGH - 40. Attractive and sexy. Strong. Independent. Think Connie Britton as prototype. GUEST STAR (possibly one day guest star); ALEX COBURN - 25. A young Marine. 6' 2"- 6' 4". Athletic build. Brown hair, blue eyes. CO-STAR.
From Casting Calls