Totally Killer released on Amazon Prime Video on October 6, 2023 and it successfully convinced fans to be  fun time traveler slasher film. 

Production house Blumhouse has proven its knack for blending horror and comedy in a series of successful 'slasher mash-ups' with the latest film. 

The production company has already delighted audiences with masked-killer fun in films like Happy Death Day, a Groundhog Day-inspired murderfest, its sequel Happy Death Day 2U, which takes a page from Back to the Future Part II, and Freaky, a body-swapping spin on Freaky Friday. 

Now, they introduce another twist of the knife in Totally Killer, a lively, gory, and unabashedly '80s slasher comedy that playfully pays homage to Back to the Future. Oh, and yes, there are murders.

The story unfolds in the present, with teenager Jamie (Kiernan Shipka, from Chilling Adventures of Sabrina, who convincingly embodies the essence of an '80s teen movie high-schooler) yearning for some Halloween excitement, tired of her mother Pam's (Julie Bowen from 'Modern Family') overly strict rules. 

However, Pam's protectiveness stems from a traumatic past; as a teenager, she lost her friends to the Sweet Sixteen Killer, who terrorized their school in 1987. When the same killer resurfaces in 2023, Jamie becomes a target. A narrow escape propels her into the hands of her brilliant friend Amelia (Kelcey Mawema), who has a time-traveling photo booth (just accept it). 

Jamie is sent hurtling back to 1987, where, in a true 'Back to the Future' fashion, she encounters her future parents and must ensure their survival amidst the murderous rampage. She also has an opportunity to solve or prevent the original killings.

The setup is compelling, and director Nahnatchka Khan exhibits a solid understanding of both slasher films and time-travel narratives. 

The intricacies of time-travel mechanics take a back seat, and the focus is squarely on delivering a blood-soaked good time, as well as highlighting the differences between the Gen X and Gen Z childhoods. Jamie is shocked by '80s fashion, racially insensitive sports logos, and a lax approach to data security. 

Her actions in the past have a direct impact on the future, even as she arrives armed with a true-crime podcast series detailing the original killings. However, her interference quickly leads events down unexpected paths.

While 'Totally Killer' may not match the exuberance of the 'Happy Death Day' series or the gore of 'Freaky,' it successfully balances comedy and horror. The film maintains a vibrant, colorful, and poppy teen-movie aesthetic, shifting effortlessly between humor and horror without skimping on the body count as the Sweet Sixteen killings unfold once again. 

The film's final reel plays out like a thrilling amusement park ride, brimming with energy and clever twists that keep you engaged without overthinking it. As a delightful Halloween offering, 'Totally Killer' is undoubtedly a treat. And if Blumhouse ever decides to take a stab at a full-on 'Back to the Future Part III' Western with murders, count us in. While it may not be a classic, this fusion of Halloween and 'Back to the Future' is undeniably a scream.