In a parallel England, the Doctor tries desperately to convince his captors of the immense peril they are in. But they are convinced he is a spy. And penetration zero is getting close…
May 23, 1970
Jun 06, 1970
Christopher Benjamin, Derek Newark, Ian Fairbairn, John Levene, Nicholas Courtney, Olaf Pooley, Roy Scammell, Sheila Dunn