Spider-Man TAS "The Ultimate Slayer"

Mary Jane Watson attends an Oscorp event that a now-mutated Alistair Smythe attacks.
Smythe knocks out Norman Osborn, but is captured by one of the Kingpin's retrieval vehicles. Harry and Mary Jane chase after Smythe, but get captured as well.
To preserve his base's secrecy, Kingpin and his men release knockout gas inside the vehicle, anesthetizing Mary Jane, Harry, and Alistair. Arriving at Kingpin's base, Herbert Landon has Mary Jane and Harry placed in a holding cell where they eventually recover from the gas.
They're later freed by Spider-Man, but not before Mary Jane takes out one of the guards.