Survival of the Fittest - S7-E17
Continuity mistake: When Carter is talking to the boy who has asthma, at one point he says something like "I'm trying to help," notice the tube is not in the boy's mouth. The angle then changes, and he is holding the tube in his mouth instantly.
Answer: It was in "Chaos Theory", the first episode of season 9 (time code 00:13:55).
Super Grover ★