Grimm is a series about a Homicide investigator, Nick Burkhardt, who finds out he descended from a line of guardians known as Grimms, who are responsible for keeping balance between humanity and the mythological creatures of the world called Wesen, who appear a regular human beings to everyone else.

Nick receives help from his Wesen friends Monroe and Rosalee, his partner Hank Griffin, his girlfriend Juliet, his captain Sean Renard, a fellow Grimm Theresa "Trubel" Rubel and a few other Wesen friends he's made along the way. Trying to keep his friends and family safe, Nick goes above and beyond to prove to all Wesen that he is not your typical Grimm. However, he will cut off a head or two if need be.

So far in Season 4, there is a lot more action, more drama and more humor, proving it to be the series' best season.

Grimm returns to NBC on Friday, January 16 at 9 pm.

Here's a look at the top 10 moments so far from Season 4.

***Warning Spoilers Ahead***

[new page=The Wedding]

10. Mayhem at Monroe and Rosalee's wedding

At the end of Season 3, we enjoy a brief moment of happiness as Monroe and Rosalee get married. However, that moment is short lived after Trubel shows up and all the Wesen guests see that she is a Grimm. We also find out that Nick no longer is.

[new page=Loyal Friends]

9. Monroe and Rosalee skip their honeymoon to help

After discovering that Nick is no longer a Grimm, Monroe and Rosalee decide to skip their honeymoon to try and help him get it back.

[new page=Elizabeth]

8. Captain Renard's mother, Elizabeth, saves the day

After bringing her son, Captain Renard, back to life, Elizabeth helps Nick become a Grimm again. She concocts a potion which turned Juliet into Adalind. After sleeping with him, Nick should regain his Grimm abilities.

[new page=A Mysterious Case]

7. Quadruple trouble

With all the chaos going on with Nick not being a Grimm, he still has police work to do. He enlists Monroe for help taking down a suspect, or two, or four!

[new page=El Chupacabra]

6. The legend of the Chupacabra

One of the best things about Grimm are the real legends that they incorporate into their fantasy world. From the beginning, the show has used classic fairytales and folk legends for their story lines. It's great to see them stick to it with their use of the legendary creature that originated in Puerto Rico.It also gave Juliet a chance to use her Spanish skills.

[new page=Trubel is in Trouble]

5. Nick and Hank save Trubel

After she almost looses her memory to a mind sucking octopus faced Wesen, Trubel's Grimm abilities save her, as does Nick and Hank who come just in time!

[new page=Trubel saves the day]

4. Trubel saves Nick and Hank

With Nick still not a Grimm, Trubel is the one who must step forward and save everyone. Nick is about to be pulverized by an angry Wesen, but Trubel manages no save him with her usual Grimm super strength.

[new page=Monroe gets angry]

3. Don't mess with Monroe's Christmas

When three goblins-like Wesen called kallikantzaroi terrorize the town during Christmas time, Nick (With his Grimm Powers restored) must try and catch them before they cause any more damage, especially when Monroe's home is involved!

[new page=Sergeant Wu]

2. Wu wants information

With the Chupacabra on the loose, Wu believes that there is something going on that Nick and Hank aren't telling him. At his breaking point, he approaches the detectives and demands answers. However, as Nick is about to give him the full story, they are interrupted, yet again! Poor Wu, I hope he finds out soon before he goes insane!

[new page=He is Back]

1. Nick is a Grimm again

After sleeping with Juliet, who looked like Adalind, but was still Juliet on the inside, Nick was able to return to his life as a Grimm. The best moment of the season filled with a bunch of twists and turns. However, while we're all happy that he's back, What's going on with Juliet?