Caligula's erratic behaviour continues, as he makes his horse a senator and turns the palace into a brothel. Many in the Praetorian Guard grow to realise that their ruler is insane and, fearing the collapse of Rome itself, believe that something needs to be done.

Cast: Derek Jacobi, John Hurt, Margaret Tyzack, Beth Morris, George Baker, James Faulkner, John Rhys-Davies, Jon Laurimore, Anne Dyson, Lockwood West, Arthur Whybrow, Douglas Melbourne, Alan Tucker