10 Must-Watch Sci-Fi Movies on Peacock Right Now (October 2025): ‘Event Horizon’ and More

Killer dolls, meet modern technology. Combining two of our favorite sci-fi and horror tropes, M3GAN follows Gemma (Allison Williams), a roboticist placed in charge of her niece Cady (Violet McGraw) after Cady’s parents die in a car crash. Gemma has secretly been working on M3GAN (Amie Donald, voiced by Jenna Davis), a robot companion for lonely children, and when Cady and M3GAN hit it off, it seems like the perfect solution to both of their grief. However, the seemingly perfect companionship takes a dark turn when M3GAN becomes overly protective of Cady, leading to unexpected and terrifying consequences. 

Iconic action sequences (and dance moves) as well as a hilariously dark script made M3GAN a viral sensation, but it’s not just the campy horror that makes it a great movie. The film also raises interesting questions about over-reliance on technology, especially when it comes to parenting, leading to a movie that’s thought-provoking as well as entertaining.