Here's the description for the episode of Alias in which Golden Globe winning Ricky Gervais, from the Golden Globe winning comedy, The Office, guest stars:

Sydney and Vaughn must convince bomb maker Daniel Ryan (Golden Globe-winner Ricky Gervais, "The Office") that they are part of The Covenant in order to find out where he has hidden one of his devices. But Sydney discovers that her ties to the bomber could lead him on a suicide mission, on "Alias," SUNDAY, MARCH 14 (9:00-10:00 p.m., ET), on the ABC Television Network.