Variety by Maureen Ryan

The cast has terrific chemistry, and the second season of the show ably builds on the strengths of the quite enjoyable first.

The New York Times by Neil Genzlinger

Well cast and written and staged with a campy sense of humor.

The A.V. Club by Steven Shehori

Although Killjoys has ambition and creativity to spare, it often lags in execution. Compelling storylines find themselves saddled with heavy-handed exposition and clunky, B-grade dialogue.

Entertainment Weekly by Jonathan Dornbush

Hannah-John Kamen's strong performance and plenty of family drama do result in some solid personal lore, but the show lacks a sense of place. [19 Jun 2015, p.58]

The Lincoln Journal Star by Jeff Korbelik

The action is good, with all three actors receiving and dishing out their fair share of abuse, but the story is, literally, difficult to follow.

Pittsburgh Post-Gazette by Rob Owen

Killjoys tries to build a mythology, but both the low-rent look--a red filter for this scene! a green filter for this scene!--and the emphasis on fights over character development dooms the show to medocrity.

The Hollywood Reporter by Whitney Matheson

Killjoys boasts slick outfits and action sequences, but the rest is pretty fuzzy. Characters are hard to define beyond their physical attributes, making them difficult to root for (or against).

Variety by Brian Lowry

Frankly, the only moderately ambitious thing about the show is the set design--immersed as it is in brownish hues and grunge--and even that feels borrowed from any number of sources blessed with more expansive budgets or simply a heftier dose of wit.