Season 4
Episodes
1. Downshift to Danger
1974-09-29
The grand prize of the 20th Annual Golden State Rally in Monterey is an antique car collection willed by a late millionaire. Mischief develops into mishaps and worse, until an entrant is killed.
2. The Game of Survival
1974-10-20
A temperamental tennis champion is suspected of murdering a newspaper magnate who had him suspended.
3. Buried Alive
1974-11-10
A WWII intelligence colleague, long since thought to be dead, turns up and is murdered.
4. Guilt by Association
1974-12-08
Mildred is accosted while serving on a sequestered jury, then another juror is murdered in his locked room.
5. Night Train to L.A.
1975-01-19
Mac heads south to a police convention on a train filled with officers, Mildred, and the author of Cops and Other Crooks, who is murdered en route.
6. Love, Honor and Swindle
1975-02-16
It seems that Mac's sister is engaged to a con man out to diddle a mining company.