After the phony murder attempt on Frank Kearney's life, a stock shot of an ambulance (from the Season One episode, "The Ransom") shows Kearney being taken to "Memorial Hospital." But shortly thereafter, a sign on what is supposed to be the hospital building says, "Mert County General Hospital."
When Lisa leaves Frank's room and turns the radio on, it is clearly still in the off position, yet when she comes back in to turn it off, it is now in the ON position.
A few seconds before the 33m mark, the "slap" Frank gives Lisa can obviously be seen as a clap of Frank's hands.
During the intro sequence, as the black Lincoln Continental is going over the cliff, cables can be seen attached to the back of it.
During the teaser, just before Frank Kearney (Joe Don Baker) confronts undercover agent Milt Anderson (Lee Delano) with his suspicions about Anderson's real identity, the shadows of crew members moving around nearby are visible in the reflections on the shiny side panels of the vehicle, even though the two men are supposedly alone at the sea cliff.
At the warehouse, palm trees can be seen in the background. Palm trees are not a normal feature of the Pacific Northwest where this takes place.
Reflected in the lower right-hand portion of the windshield as Joe Don Baker and Linda Day George are getting into the car.
After the assassination attempt on Frank Kearney (Joe Don Baker) and Casey (Linda Day George) on the street near the end, they take refuge behind a parked car. The reflection of the boom mic is visible on the hood of that car.