A mystery writer (guest star Shelley Long) uses Mark and Steve's (Dick Van Dyke, Barry Van Dyke) investigation for ideas for her new book. Adam West also guest stars.
Hallmark Mystery1h
Watch Diagnosis Murder with Fubo
- 100+ channels of live sports & TV
- Up to 1,000 hours of Cloud DVR
- Stream on up to 10 screens at once
- No contract, no commitment
Starting at $79.99/mo
Additional taxes, fees, and regional restrictions may apply