Dead Heat (1988)
Doug says "Now what have we learned from this little adventure, Dorothy?"
When Roger and Doug are in their car and get called about the robbery, Roger spins the car around and takes off, and Doug calls him Dirty Harry
Doug refers to a tough looking character as 'Mongo'
Cop murdered, comes back as zombie, he and partner go after killer
Mortis & Bigelow visiting the chemical company in that film is referenced in the scene where Colt & Luger visit the cookie company.
The line "You Wanna be Dead? Well here's the chance of a lifetime." was previously said in Dead Heat.
Is playing on the TV when Randi discovers Doug's dead body.
At the end, the two main characters walk into the fog (knowing that they had a few hours before dying) and instead of saying "this could be the beginning of a beautiful friendship" they say "this could be the end of a beautiful friendship"
Doug impersonates Mr. Sulu in a scene.