Kiernan Shipka bonds with her mom’s teenage self while trying to stop a masked murderer in the first full trailer for the forthcoming horror-comedy film Totally Killer.

Nahnatchka Khan’s feature hails from Amazon Studios and Blumhouse Television, and it hits Prime Video exclusively on Oct. 6. The movie centers on Jamie (Shipka), who goes out on Halloween night despite her protective mother’s (Julie Bowen) warnings and finds herself attacked by the infamous killer who murdered her mom’s friends years ago. Jamie then accidentally time-travels to the 1980s, to just before the original crimes took place, and has to prevent them from happening in order to return to present day.

The trailer features plenty of comedic moments, including Shipka’s lead character attempting to get to know the high school version of her mom, played by Olivia Holt. While learning about life in 2023, Holt asks, “Do the machines kill us all?...