Magic Jeep. During the last minutes the driver-less Jeep slowly runs into a tree (or utility pole) and stops. Then the manual transmission magically shifts itself into reverse. Finally going in reverse about 30 feet beyond where it had driven over a person on the trail, it just shuts itself off.
In the very last scene as Mannix, Peggy and Toby are walking away from the jeep, a crew member can be seen peeking out from behind the trees to the left side of the screen.
In the opening tease, after Martha is karate-chopped in her walk-in closet, the obvious shadow of both the camera operator and his Panaflex camera hovers over the actress on the floor as it pans to a Zippo lighter.
Obvious stunt man doing the gymnastics moves for Darren McGavin when Mannix is talking to him in the gym.