Linda Lusardi played Don Beech’s girlfriend in 9 episodes, Love or Money, Fake Fur, Find the Lady, Fifty-fifty, The River, All Fall Down Part 1, All Fall Down Part 2, 210: Rookies and Professionals and 216: Nemesis.
Ralf Little was in 3 episodes: Night Games, Aftershock and Judas Kiss.
Beverley Callard played Chrissie Hendry in 014 Walking On Water
Roger Lloyd Pack played drugs barren Mick Mortimer in 6 episodes: 039: Certain Uncertainties; 040 Jeopardy; 041 Gone Native; 042 Requiem; 043 Quick Off The Mark; 044 Access Denied. He also starred in the 1991 episode The Negotiator.
Liz Smith played Harriet ‘Tatsie’ Wright in 2 episodes: 040 Jeopardy and 041 Gone Native. She also appeared in The Drugs Raid (1984), Dead Man’s Roots (1991) and Sucking Eggs (1998).
Nicola Stapelton played Tina Pope in episodes 033 Loggerheads, 034 Protection and 035 Imposters. She also appeared in the following episodes: Double or Quits (1991), The Bus Drivers Prayer (1998), 460: A Stiff Upper Lip and Who Dares Wins (2010).
David Walliams in 034: Protection.
Stefan Dennis played a ring leader in a gang of shoplifters in 112: Laid To Rest.
Burt Kwouk played Father Kwong in 101: Out Of Your Depth and 102: Juggernaut. He also appeared in episode 372: Cop The Lot (2005).
Anna Wing played Alice Clarke in 087: Without A Trace. In 2007 she appeared in the episode: A Life Of Lies.
Lynda Bellingham played Irene Radford in 19 episodes, running from episode 223: Insensitivity to episode 273: Return of the Gang Queen.
Lenora Crinchlow played Shirley Moss in 12 episodes, running from 219: The Tunnel – Part 1 to 271: One Rule For One.
Peter O’Brien played DI Peter Cavanaugh.
Georia Moffett played DI Sam Nixon’s daughter, Abi Nixon, also returned for Sams final episode.
Pauline Quirke played killer Lesley Palmer.
Les Dennis played Tom Walker.
Andrew Sachs played David Leyton.
Darren Day played photographer.