Jean-Claude's arm across his chest changes position between shots after Jonathan & Jennifer discover him dead in his house.
As Jennifer, Stefanie Powers keeps her fingernails rather short. But the fingernails of the hand searching the trunk and removing the tape player from the briefcase are much longer.
The same green Volkswagen Beetle is seen twice at the funeral.
When Tristan the dog is 'attacking' Jonathan, his mouth changes position without being seen to let go. And Jonathan should have blood coming from bite marks and the sleeve of his shirt should have holes/tears, not just the sleeve of his jacket ripped off.
At the end of the episode, Jonathan, Jennifer, Max and Lt. Doyle are bowling. At the beginning of the scene, Jennifer is sitting several feet away from Jonathan and Lt. Doyle. When Max misses two pins, Jennifer is sitting next to Jonathan. In the long shot, she's sitting several feet away again.