Did You See the Sun Rise? - S3-E1
Other mistake: During the opening credits, the writing "and Lance LeGault as Buck Green" appears. As shown by the name tag later in the episode, his character's last name is Greene with 3 Es. (00:06:50)
Did You See the Sun Rise? - S3-E1
Audio problem: The noise of TC's helicopter powering down is Out of Sync with the speed of heli blades you can see in the reflection of the glass, and the effect on nearby vegetation. (00:09:40)
Did You See the Sun Rise? - S3-E1
Revealing mistake: TC's arrival is announced by the loud sound of his helicopter, which makes Higgins' desk comically shake. Fun sight gag, but looks totally phony, since everything in the room, including the plants, is completely still. (00:09:00)
Did You See the Sun Rise? - S3-E1
Continuity mistake: When Magnum is in the middle of his deductive process, Higgins indulges him answering that hardly anyone manufactures the gunpowder he needs anymore because of the low flashpoint. There's a cut in the middle of the sentence; the matches lined up in front of the chopping board are positioned differently on the right end, the one he places the newest victim at. (00:08:20)
Did You See the Sun Rise? - S3-E1
Continuity mistake: Magnum walks up to Higgins as he is beheading the matches. In the first shot he put just his hand on the desk, in close-up he is leaning all the way with his elbow. (00:07:20)

Did You See the Sun Rise? - S3-E1
Continuity mistake: Magnum's sling looks different before the flashback and after it when he speaks with Higgins. (00:48:50)