Dennis Monroe Parker, Yaphet Kotto, is a character in the 1979 film Alien.
Parker is the Nostromo's chief engineer; Samuel Brett is his assistant. On the ship, he incessantly demands bonuses for investigating the Derelict's distress beacon.
After Dallas' fateful confrontation with the Alien, Parker investigates and finds the flamethrower left behind. When Ash attacks Ellen Ripley, Parker and Joan Lambert save her and decapitate the android. After Ripley extracts the meaning of Ash's directive to allow the crew to die, Parker uses the flamethrower to incinerate his remains.
He and Lambert are killed by the Alien when it ambushes Lambert in their attempt to flee aboard the shuttle, with the Alien crushing Parker and finishing him off with a head bite as he attempts to save Lambert from the Alien attack.