Continuity mistake: When Higgins makes his way towards the net and we get the wide shot of the court, there are obvious shadows from the foliage all over the playing space, which is totally sunlit in the other angles. (00:03:35)
Continuity mistake: Rick guesses the player Higgins managed to go against, "Tappy" Larsen. As he says the name, he puts the racket hand on the net and the ball hand behind it. Next shot and both are on it. Similar mistakes happens at the end of the reminiscing part of the convo, with Rick again suddenly changing position (hand on the racket all of a sudden) between shots. (00:04:35)
Continuity mistake: Carrie is having a hissy fit because she believes that Ginger tries to put strain on her ankle. The towel on her shoulder is folded differently in the different angles. (00:09:10)
Continuity mistake: Magnum is introduced to the capricious Carrie Reardon. She says that she hopes he's better than the last babysitter they gave her. Behind her, you can spot some tennis balls between courts. Kenny Phelps chases her, and the court is all clear. (00:09:35)
Continuity mistake: Discussing the hanged figurine in Higgins' study, Magnum is holding the string very close to the noose in the close-up, but definitely at large distance in the wider angles. (00:12:00)
Continuity mistake: When Rick collides with his double partner, the wind is still. Close-up on both of them as romance sparks, and the wind is blowing heavily. (00:16:35)
Continuity mistake: Seeing Higgins in the audience, TC dismounts from his big boy chair and prepares to storm across the court, pencil on the ear and clipboard in his right hand. To the other end of the net, the pencil is at a different angle and the clipboard jumps to the left hand. (00:19:40)
Continuity mistake: During the car chase, Magnum is wearing a large wristband, which appears also in the close-ups of the gears being shifted. It's nowhere to be seen in the side views of Tom Selleck in the car, though. (00:21:40)
Continuity mistake: Magnum suggests Carrie to quit; she tells him it's not that easy. Obvious discontinuity in the hair position at the transition between the two shots; big curtain of hair draped around the shoulder, clears itself back in the second. It happens again, and it is again self-evident even later when Higgins barges in and there's an overhead shot from his position. (00:30:00)
Continuity mistake: When an annoyed Magnum tells TC in the locker room "Well then you can play!", the coach, mentor and potential killer is holding the racket turned towards a different direction (by the flat or by the side). (00:34:05)
Continuity mistake: Magnum, defeated, receives the racket from TC and makes his way to the court. In the scene in the locker room, his injured finger was not taped. When he talks to his insidious double partner before the match, the index is fully taped. (00:35:00)
Continuity mistake: When Higgins asks TC "Was I wrong to assume" at the end of the episode, TC's right arm is lowered, while it should be raised enough for him to keep his hand on the chopper door. (00:44:25)
Continuity mistake: At the end of the episode, TC receives the bags and basket from Higgins' ladies; in the transition across the "Evelyn gets a teensy bit airsick." line, the two women behind Agatha have different hand positions - in particular the one with the maroon dress is adjusting her cleavage in the first shot, but has both hands supporting the camera in the next. The position of the bag and goggles on Agatha's arm change too, noticeably as the bag'strap is off/on the sleeve all of a sudden. (00:45:25)
