How did diagnosis murder end?

"Diagnosis Murder" concluded its run with a two-part series finale titled "Diagnosis Murder: The Last Case." In the finale, Dr. Mark Sloan, played by Dick Van Dyke, solves a complex murder case involving a mysterious killer. The episode wraps up with heartfelt moments among the characters, showcasing their growth and relationships over the show's run. Ultimately, it provides a sense of closure for fans, highlighting the show's blend of humor and drama.