by John Elliot
[Starring] Ray Barrett, Geoffrey Keen, Philip Latham, Beryl Cooke
Guest star Patrick Allen
Stead, Thornton and Izard are on trial tonight. State secrets have been leaked to a foreign power - and the Ministry of Defence investigator says it must be from one of these three men.
In this final episode, the action all takes place in Mogul House as Commander Fayne (Patrick Allen) conducts his interrogation.