Anthony Howell (Dr Keel)
Julian Wadham (John Steed)
Lucy Briggs-Owen (Carol Wilson)
Cate Debenham-Taylor (Lisa Strauss)
Harriet Kershaw (Susan Summers / Secretary)
Ramon Tikaram (Saunders)
Richard Dixon (Redington / One-Fifteen)
Christopher Taylor (Boris / Landlord)
James Joyce (Jack Alford / Peters)
Robert Fitch (Technician / Dr Philip Karswood)
Karina Fernandez (Dr Ampara Alvarez Sandoval / Maria Alvarez)
David Shaw-Parker (Hercule Zeebrugge / Luis Garcia)
Andy Secombe (Inspector Gauvreau / Godoy / Jose Alvarez)
Alex Blake (Rayner / Caron / Sergeant Delon)
Tom Alexander (Mateos / Mario)
Dan Starkey (One-Ten)
Bettrys Jones (Barbara Anthony / Receptionist)
Richard Atlee (Heneager / Herbert Truscott)
Ewan Bailey (Dr Hugh Chalk / Armstrong)
Glen McReady (Dr Owen Craxton / Professor Kilbride)