Whatever Happened to Sarah Jane? (1) - S1-E8
Plot hole: When Maria Jackson is running away from the alien creature, she turns left into a metal fencing. The camera shows this seconds before she runs into it, banging on it in frustration. This does not make any sense. She saw the metal fencing, so why did she continue to run into it? Why did she not turn right instead and along the park?
Plot hole: In the pilot episode Chuck mentions his mother speaking as though she is still alive and he knew her but in later seasons it is reveled that she supposedly died while giving birth to Chuck and he never knew her.
Shut the Door, Have a Seat - S3-E13
Plot hole: Pierce getting fired would invalidate his work visa. His existing visa would have been for overseeing the management of a foreign firm with a US presence. He would have had to leave the country and reapply for an investor visa. (00:41:25 - 00:42:00)
Plot hole: Someone as careful and controlling as Timo would never force anyone into working for him, for exactly this reason.
Plot hole: I believe in the very first episode, during the flashback when Mick remembers rescuing Beth and killing Coraline, we see him stab her with a wooden stake, which is supposed to paralyze a vampire, as said in the "Dr. Feel Good" episode. However when Mick looks back with Beth in his arms, Coraline suddenly gets up and watches him leave while burning to "death." This is simply not possible; in the "Dr. Feel Good" episode, Mick could not release the stake himself and asked Beth to do it. This also happened in the episode when Josef was staked by the hit man that was hired to kill him, (in the episode where we meet the woman, Sarah I believe, that he accidentally put into a coma after attempting to turn her). Again, Josef was unable to remove the stake himself and Mick had to do it for him, so there is absolutely no way Coraline would be watching Mick and Beth leave; she would still be on the ground possibly burning to death.