Grimm was a cult hit in the US and UK with its first season, and David Giuntoli returns as lead Nick Burkhardt for more haunting drama second time around.
Watch the Grimm season two trailer:
The show centres on Burkhardt - a Portland Homicide Detective - who discovers he's descended from an elite line of criminal profilers known as 'Grimms'. Suddenly all his police work has a storybook connection, and he has to protect those who are close to him while also battling ancient evils.
Speaking about the show's second run, exec David Greenwalt said: "The next year will be about Nick coming into his own a lot more. There will be people from Nick's life who appear - and it'll be about him becoming a more realised Grimm, if you will.
"He's going to face a lot of competent enemies in the next year."
Grimm returns to screens in the UK on Monday, October 22 at 9pm on Watch.