Overhearing a negative medical prognosis for a horse, Agarn (Larry Storch) becomes convinced that he himself is not long for this world. Tearfully, Agarn prepares to big goodbye to F Troop and wander off to spend his last hours alone. It falls to doddering Indian medicine man Roaring Chicken (Edward Everett Horton) to set this situation aright--but not before an unscheduled appearance by the formidable Colton Brothers. With this episode, recurring characters Duffy (Bob Steele) and Dobbs (James Hampton) are promoted to regular status. ~ Hal Erickson, Rovi