detective inspector christopher riddick, played by roger griffiths, is a local police officer. riddick first appears following paul trueman's (gary beadle) arrest for running drug errands for andy hunter (michael higgs). riddick urges paul to stop protecting andy and implicate him and paul does so. when paul is later murdered, riddick and his colleague ds jones question andy, who has an alibi for where he had been at the time. riddick's last appearance is when chrissie watts (tracy-ann oberman) is arrested for the murder of her husband den (leslie grantham).