Diagnosis: Murder is a mystery/medical/crime drama television series starring Dick Van Dyke as Dr. Mark Sloan, a medical doctor who solves crimes with the help of his son, a homicide detective played by his real-life son Barry Van Dyke.The series struggled at first and was almost canceled at the end of the second season, it returned as a midseason replacement in the third season, and was regularly renewed thereafter. 178 episodes were made and aired in the show's eight seasons on the CBS network in the United States and two more TV movies aired after the series' cancellation on May 11, 2001. Since 1997, the show aired in reruns on ABC Family (formerly The Family Channel) and on the Hallmark Channel in America, weekdays on the Hallmark Channel (UK), Alibi and BBC One in the United Kingdom and weekdays on Foxtel's TV1 channel in Australia. The show was produced by The Fred Silverman Company and Dean Hargrove Productions in association with Viacom Productions and Paramount Network Television (Season 2 only) and is currently distributed by CBS Television Distribution.
Lesley-Anne Down portrays the role of Catherine Windsor in "A Model Murder" on Diagnosis Murder in 1996.
