My three favorite villians are
1.Johnny Lyons played by Tony Selby Queen's Pawn.
2.Sara Prince played by Nicola Pagett in Stoppo Driver was a sexy bitch.
3.Vic Tolman played by Geogre Sewell in Bait.
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Tim 'The Leopard' Cook was an excellent villain. George Sweeney gave two cracking performances in the episodes 'Taste Of Fear' and 'On The Run'. He was probably the most psychotic and dangerous of all the bad guys Regan and Carter ever encountered.
Special mention must also go to Farrell and Flynn, the two ex-IRA men in the 4th season episode 'Nightmare'. Farrell, played by Paul Antrim (who starred in BBC1's Gangsters), was a sadistic gun nut who made the fatal mistake of opening fire on Regan (getting himself shot by Carter).
Mazuma! That boy! That Boy! What about this boy?
Shut the door, Mary...