The Doctor Blake Mysteries is an UK/Australian murder mystery show set in 50s Australia with Craig Machlachlan as a police surgeon who solves mysteries. It's currently showing on BBC1 in the UK.
In episode 3 of the first season ('Death of a Salesmen') a salesman dies under suspicious circumstances. The Hoover Constellation features quite a bit as our hero has to go with his housekeeper to buy one as part of their investigation. Later on, a significant clue is found in the dustbag.
Comes to the Rescue!
