D05 Need To Know

Original Story: Chris Menaul
Writer: Brian Clemens
Director: William Brayne
Original Broadcast: UK: 05.10.1980
Episode Availability: DVD: UK Video: UK
Novelisation: The Professionals 8: Dead Reckoning by Ken Blake [0 7221 1734 5]

Cast:
CI5 Agent William Bodie · Lewis Collins
CI5 Controller George Cowley · Gordon Jackson
CI5 Agent Raymond Doyle · Martin Shaw

Guest Cast:
Maroff · Yuri Borienko
Gorky · Niall Buggy
Sikor · Anthony Chinn
Minister · Bernard Gallagher
Pymar · Tom Georgeson
Drake · Norman Jones
Choy · Chua Kahjoo
Second Officer · Mike Kemp
Ambassador · David King
Minder · Kristopher Kum
Ryan · Karin McCarthy
First Officer · Nigel Miles Thomas
Tully · Simon Oates
Manton · Patrick O'Connell
Ivan · Richard Parmentier

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An old colleague of Cowley's is arrested for being a double agent, which, in turn, implicates Cowley.