Men in Black II

The original pug from Men in Black (1997) was used to play Frank again, but since the pug was now seven years older, they used makeup to hide the gray fur around its nose.

When Agent K removes his digital Hamilton from the clock tower in the Grand Central Station locker, Agent J replaces it with the new Hamilton Ventura Chronograph. The next shot shows K's digital Hamilton back in the spot, replaced again by J's analog in the shots that follow.

The "torch lady" in the Columbia Pictures logo flashes her torch like a neuralyzer device.

There exists an alternate death scene of Serleena that seemingly was filmed but was never released on any home media, outside of an official Men In Black 2 picture book adaptation. The scene in question had Serleena giving Scrad a 'proton detonator' to destroy the MIB Headquarters, only for him to later show up and use it to destroy the Serleena, who had merged with Jeff The Worm.

Edited into Men in Black II: Alternate Ending (2002)