The original Michael Myers, in the 1978 film, was played by Nick Castle. He returned for the new film, and was seen in several scenes, including the "mask off" shots. However, actor James Jude Courtney handled the scenes with more physical work involved.
The original knife-wielding Michael Myers (@ncastlez) is putting on the scary mask once again in the latest #HalloweenMovie https://t.co/xPAvruIU3d
— USA TODAY Life (@usatodaylife) October 18, 2018