When Lt. McGuire (Nimoy) slugs Sgt. Hooker, Hooker's lip is shown split and bleeding in the next shot. However, in the shot that follows, when Hooker goes to wipe the blood from his chin, there is no blood to be wiped. Furthermore, Hooker's lip is immediately fully healed and never appears swollen in scenes that follow.
in the opening liquor store robbery, Hooker, Romano, & Romano are responding through the alleyway as backups as the thieves are attempting to back away to escape when the blue car of the thieves temporarily disappears as Hooker arrives in the alleyway and then quickly reappears.