Let me just start off by saying that there are probably more slip-ups in this show than there are in the entire category. That being said, I'll begin.
1. Episode- Where they go back to the prehistoric years
a. In the beginning, when Jimmy wanted to repeat something, he had to aim his thingy at it, rewind it, and then fast- forward it. But at the end,his mom just rewinds the dad and he automatically repeats himself.
b. How could the t-rex's head smash the diamond if it couldn't even dent the tree?
2. The return of the nanobots
a. Why weren't Carl, Sheen and the dad deleted? I know the kids got deleted later, but why weren't they in the first place?
b.When Jimmy looks at his sensor, he says that everyone in the world has been deleted. But less than a minute later, the nanobots are just finishing off the French- their second target.
3. Hall Monster
a. When Jimmy starts showing off his new equipment in his lab to the dog-thing, it goes to a sillhouette of him putting on his helmet. Somehow, he seems to just force it onto his head, without lifting it over it or anything.
4.the one with the plot cheaply stolen from "Jaws"
a. Captain betty was swallowed by the cheap imitation of a sea monster. But when Carl shoots it down to size with a strangely convenient pill, something should have gone wrong because (as I hope you already know), there's no way a grown man would have fit in a tiny turtle's stomach.