Thank Heaven for Little Girls and Big Ones Too - S1-E4
Visible crew/equipment: When Higgins tries to phone 5-0, TC lifts him up and places him out on the hotel balcony then locks the sliding glass door. The top of the camera and the bottom of the reflector screen are reflected on the glass door. (00:42:04)
Thank Heaven for Little Girls and Big Ones Too - S1-E4
Continuity mistake: On one side of the metal detectors, the bad guy has sweat soaking his shirt from shoulders to pits. When he retrieves the painting, he has just a stain at the middle of his back. (00:46:00)
Thank Heaven for Little Girls and Big Ones Too - S1-E4
Continuity mistake: The position of the tube at the end of the conveyor keeps changing between shots. (00:46:40)
Thank Heaven for Little Girls and Big Ones Too - S1-E4
Character mistake: Higgins is extremely protective of any little trinket and bric-à-brac at the Estate, but in this episode he barely bats an eyelid at a post-impressionist masterpiece being handled casually, rolled up and passed around. He handles it pretty badly himself.
Thank Heaven for Little Girls and Big Ones Too - S1-E4
Other mistake: Magnum gets inside the Waikiki Natatorium War Memorial climbing athletically over the closed gate. The bad guy comes roughly from the same direction, but given his physical state, one wonders how could he accomplish such a feat - it is conveniently kept off camera, but he comes from a direction with no gates. To beat him to the finish, Rick picks another direction entirely just walking around the bleachers! And they all end up at the same location.
Thank Heaven for Little Girls and Big Ones Too - S1-E4
Continuity mistake: The bad guy is supposed to retrieve the painting just a few minutes after Magnum made the drop, but the light is very much different between the two scenes, and the sky seems to change even between the moment the obese villain goes up the stairs and the time he somehow makes his way down them without dying.
Thank Heaven for Little Girls and Big Ones Too - S1-E4
Revealing mistake: Throughout the whole episode, every street scene downtown shows moisture and light reflections on the camera lens.