The previous Lethal Weapon movies, Lethal Weapon (1987), Lethal Weapon 2 (1989), and Lethal Weapon 3 (1992), are featured in the end credits as film stills.
A picture accompanies almost every crew and cast member in a large photo album. It includes pictures from all 4 Lethal Weapon movies with outtakes and posed pictures. It closes on a large group shot of the crew, with a back cover with a red "4" on it.
When the Warner Bros. Logo gets finished, the shield explodes, segueing into the opening credits.