Prison cook with a good heart and is well liked by the women. Fell in love with and married officer Joyce Barry. Applies for cook's post with false references (523), and after getting the job gradually gets closer to Joyce Barry, and he becomes her second husband. Omits to mention his epilepsy, but Lexie Patterson finds out and uses it against him.

Mervin takes part in Iron Chef ,a cooking competition tv show which he wins.

First seen in 'Prisoner' playing a small part as Dr. Crawe in episode 22.

Ernie Bourne also played Peter Hope, a man who Doreen met in the lonely hearts column (192).