Totally Killer delivers a wildly entertaining mashup of horror, comedy, and time-travel sci-fi that revitalizes the slasher genre. The film follows 17-year-old Jamie, who finds herself catapulted back to 1987 after the infamous 'Sweet Sixteen Killer' resurfaces in her present day. Her mission is simple but daunting: prevent the killer's original murder spree before it even begins. What unfolds is a clever, often hilarious collision of modern sensibilities with 1980s culture, as Jamie navigates the era's fashion, technology, and social norms while hunting a masked murderer.

The film shines through Kiernan Shipka's charismatic performance as Jamie, balancing genuine terror with sharp-witted humor. The supporting cast, particularly Olivia Holt and Julie Bowen, add depth and comedy to the high-stakes premise. Director Nahnatchka Khan expertly blends genuine slasher tension with laugh-out-loud moments, creating a tone that feels both fresh and nostalgically satisfying. The 1987 setting isn't just backdrop; it's integral to the plot and humor, offering clever commentary on how much has changed—and how much hasn't.

With its inventive premise, strong performances, and perfect balance of scares and laughs, Totally Killer is a must-watch for fans of genre-bending entertainment. It respects horror traditions while subverting them with smart humor and a compelling time-travel mystery. Whether you're here for the suspense, the comedy, or the delightful 80s throwbacks, this film delivers an thoroughly enjoyable ride from start to finish.