Night Shift - S3-E11
Continuity mistake: When Carter and Doyle are running down a corridor to the patient having a heart attack, the camera follows them along the floor and you can see several coloured lines going down the hall. After we see this, they burst through a double door, and if you look behind them you cannot see these lines anymore; they've simply vanished.
Answer: It was in "Chaos Theory", the first episode of season 9 (time code 00:13:55).
Super Grover ★