The call went out. The recruits came in. No longer would police cadets have to meet standards of height, weight and other requirements. Brains were optional too. Can't spell IQ? Don't KNow the number 911? No matter. Police Academy grads are ready to uphold law and disorder.

Building on a nightsticks-and-slapstick tradition going back to the Keystone Cops, Police Academy spawned 6 sequels plus 2 TV series (one animated, one live-action). Now the popular debut film calls for backup, adding arresting 20th-anniversary DVD extras.