Vigilante (S05E11)

Arthur Wakefield suffers a heart attack while confronting Terry Tinniswood, who is attempting to break into his house. Tragically, Arthur passes away, but Mrs. Wakefield identifies Terry through photographs and later in a lineup. The Tinniswood family insists that Terry was at home all night during the incident. In response, Mrs. Wakefield plots to make Terry feel guilty and anxious. Meanwhile, Special Constable Cowley, who is convinced he knows everything, is assigned to assist Nick, much to Nick's annoyance. Cowley is eager to win the best gooseberries at the upcoming flower show, but his wife ensures he won’t succeed. Greengrass's scheme to cheat in the show ends in disaster!