Men in Black 3
Smith returns in Men in Black 3. Agent J (Smith) goes back in time to 1969 to prevent Agent K, played by Tommy Lee Jones and Josh Brolin, from being killed by a Boglodite named Boris the Animal. When speaking of his idea to cast someone else as a young K:
You know, what was exciting to me, also, about doing this is how risky and dangerous and almost foolish it was to try to make Men In Black and introduce a new actor to play the, you know…