When Lucas, an agent investigating something subversive, gets off his train at the wrong station he is murdered. Has the crime got anything to do with a mole at the admiralty, a train ticket and a fiendish plot to kill the Prime Minister? This episode's guest stars include Drewe Henley, who also played Red Leader in Star Wars: Episode IV.
Elenco:
Patrick Macnee
,
Honor Blackman
,
Diana Rigg
,
Linda Thorson
,
Ian Hendry
.