Alfred Marks

Captain Katt/Ludovic French/Inspector Brough

Derek Royle

The Professor/Frank Lucas

Janet Behan

Lieutenant Rook/Louise Jobling

Simon Rouse

Desmond Gibb

Sarah James

Pat

Clare Clifford

Margot

Howard Samuels

Toby

John Elmes

Dave

Patricia Maynard

Madeleine Forsyth

Ian Fairbairn

Ted

John Owens

Joe

Ros Simmons

Mugwump/Sylvia Pym

David Hatton

Jack Judge

Peter Grimwade