Continuity mistake: At the end of the episode, Thomas is sitting by Higgins that is playing Pac Man. TC arrives and Magnum stands up. There are two towels on the wall, and they are one on top of the other not overlapping by about 3 inches. By the time TC is in the water with Magnum, they are stacked perfectly. (00:46:30)
Continuity mistake: Rick gets KTFO by the mace being thrown at him. He collapses unconscious on the carpet that makes a noticeable hump, and his arm is past the pillar. Magnum comes to his rescue, and Rick is still out but the carpet straightened itself and Rick's arm is by his body. (00:32:30)
Continuity mistake: Higgins is still awake and Magnum sits on the couch with a glass of milk and a cookie. Between shots, the glass fills up - initially it was at the level of his middle finger, afterwards it moved up above his index. (00:29:20)
Visible crew/equipment: After the chat on the intercom with Rick, Higgins storms back to the phone. Meanwhile Magnum approaches the window. On the wall on the left of the frame, the shadow of the boom mike appears. (00:18:30)
Audio problem: Higgins watches Magnum spit what he chewed on and gives him a "Magnum..." full of contempt. Magnum responds ever cheerful "Sorry, want a bite?" but the audio of the sentence is much lower than in the rest of the scene. (00:13:10)
Continuity mistake: Higgins is interrupted in his reading of Lord Byron's "So, we'll go no more a roving" by distinctly un-African music. As it happens, the book in his lap changes angle entirely in his lap. (00:06:15)
Revealing mistake: In the flashback of the massacre in Africa experienced by the man in the opening when he stares at the moon, one of the extras is supposed to fall struck down by a rifle shot, but she is blatantly using the arms to soften the fall, and then tries to adjust flat on the ground, making it all look like she just decided to start doing push-ups on the spot. (00:03:15)
Continuity mistake: In the first scene after the opening credits, when the woman approaches the very Londonian chap greeting him with "'allo ducks", extras in the background don't transition between one shot and its reverse. (00:02:30)