The Flash (2014)

Pilot - S1-E1

Continuity mistake: In episode 2.09 of related show "Arrow," during the day the particle accelerator is activated, Barry spends his time with Oliver, Felicity, and Diggle in Starling City. He arrives back in Central City just in time to see the particle accelerator activated, and he is in his lab because he was too late and missed the line at S.T.A.R. Labs. In episode 101 of "The Flash," Barry was never in Starling City during the day the particle accelerator was activated, and he and Iris actually attended the event. (00:02:10 - 00:11:30)

The Race of His Life - S2-E23

Harrison Wells: You know what? In battle, choose your weapon wisely. Some people choose a gun. I choose a Philips head screwdriver.
Cisco: Oh, oh. I'm sorry. You're so particular.
Harrison Wells: Ramone, could you just please? Have you ever worked with a tool before?
Cisco: I'm working with one now.

Going Rogue - S1-E4

Trivia: Kahndaq is mentioned heavily in this episode. Kahndaq is a fictional country, home to DC anti-hero, Black Adam.

MasterOfAll

The Flash Reborn - S4-E1

Question: In the episode "Finish Line", the Speed Force tells Barry that he wouldn't experience the kind of hell that Savitar, Wally or Jay had. So why in this episode, when Barry leaves the Speed Force, does he seem confused and disoriented?