Captain America, Vol. 1 #287 (1983)

Future Shock!
With the Roxxon agents' aid, Deathlok subdues Cap. but when he turns to finish off Manning, they touch and Deathlok's memories are restored as Manning dies. Enraged at Roxxon using him, Deathlok slaughters the agents, and he and Cap escape, with Deathlok destroying the facility as they leave, his callous attitude to killing shocking Cap. Elsewhere. Bernie's family isn't pleased that Steve stood them up. while Nomad finds himself smitten after saving a beautiful lady. Scarlet, from muggers. After burying Manning Deathlok tells Cap that his world's heroes disappeared in 1983. Cap's present day. so Cap follows Deathlok back to his world to save the future. Arriving in 1991 via Godwulf's time machine. Deathlok demands to know why Godwulf sent him back in the first place. Godwulf promises answers.
Release Date: 1983