Continuity mistake: When the Hulk throws the tire during his second transformation, the first shot shows a horizontal trajectory but the second shot shows a 45 degree angle trajectory, which makes the tire land much further than expected.
Time Squad - S1-E4
Continuity mistake: During Blake's first encounter with Cally, the smudges on the front of his tunic (including a big chalky footprint left by her boot) disappear, reappear and rearrange themselves several times between shots. (00:31:20)
Rumpole and the Fascist Beast - S2-E4
Visible crew/equipment: While Rumpole's wife prepares the canned soup in the kitchen, several equipment shadows are moving on the wall at the top of the screen. (00:06:40)
Plot hole: In the first season, Lucy Ewing had an affair with Ray, the farm hand at South Fork. Several years later, it was revealed that Ray was actually Jock Ewing's illegitimate son, making him Lucy's uncle. However, the subject of their affair was never raised, even though they surely would have been at least somewhat traumatized upon learning of the accidental incest.
Continuity mistake: Dan enters the military facility and when talking to the guard at the check in counter, the clock behind him shows 10:15. Then in the same scene seconds later, the clock behind Dan shows close to 5:15.