Peacock drops trailer for unconventional missing kid thriller My Son, starring James McAvoy and Claire Foy
You can watch McAvoy's biggest acting feat yet on September 15

We’ve seen James McAvoy transform himself into a terrifying supernatural villain with multiple personalities, a classic Marvel character, and even a faun. But the trailer for Peacock’s new thriller My Son puts McAvoy’s award-winning acting skills to the test. You see, My Son isn’t your typical “parent searches for their kid” thriller. McAvoy wasn’t given a script, instead improvising his dialogue based on everyone else’s and using the little information he was given about his character. That means viewers uncover the mystery the same way the actor did.
“I’ve managed to have an experience that no actor gets to have,” says McAvoy in the trailer. (Though, we’d say that some actors actually have shared this experience; it’s what the The Blair Witch Project stars had to go through.) “I hope it will give the audience something really tangible that they can hang on as this thriller rattles along,” he adds.