Dr Paige (Nigel Havers) makes his first appearance when on of his patients, a fading pop star with cancer, dies from a suspected overdose. The initial evidence points to suicide but Dangerfield believes someone ‘helped' the dead man on his way…and Paige is chief suspect. An apparent case of euthanasia finds Dangerfield in the awkward position of suspecting an old friend and colleague, Dr Jonathan Paige. During the post mortem, Dangerfield discovers an injection mark on the body and all the evidence turns to Dr Paige, who denies any involvement in his friend's death.

• Don Shaw

• Idris Elba
• Jim Carter
• Hugh Dancy