Degrade and Rule

The Abwehr capture SOE radio operator Diana Maxwell, who is interrogated by Gratz with the hope of turning her as a double agent. Gratz is already operating Cadet's radio, in the flat next to his, using Private Voigt as a radio operator. He inadvertently lets slip to Nina what is going on, and she blackmails him to do as she asks in return for not informing Gratz. Diana appears to cooperate with Gratz and is installed in the flat, but Nina is able to collect genuine messages from Anton to be sent instead. Diana is able to inform London of the scheme.