The Old Man season 1 ending explained in detail shows why the FX drama remains so popular despite two years passing, and also teases what to expect from season 2. The Old Man is a slow-burn spy thriller based on the novel by Thomas Perry and stars Jeff Bridges as Dan Chase, a former CIA operative living off the grid who is forced on the run when his location is discovered. Alongside Bridges is John Lithgow co-stars as FBI agent Harold Harper, who used to work with Chase when they were both stationed in Afghanistan during the Soviet-Afghan War.