After a harrowing three-month hiatus, NBC’s Grimm returns at 9 p.m. tonight will all-new episodes; and while most of the upcoming drama will revolve around Nick’s (David Giuntoli) hot mess of a love life, Reggie Lee assures HollywoodLife.com that everyone’s favorite slaphappy sergeant will be there to lighten the mood — and maybe, accidentally, stumble onto a major secret.

“We’re coming back with a bang — a lot of bangs, both literally and figuratively,” according to Reggie, who tells me we can expect plenty of “Wu-liners” and unpredictable moments from his character.

“He’s like the wildcard of the show, they can do whatever they want with him,” he explains. “The one-liners, I tell them to keep bringing them on. With this show, which can get a little dark and scary, you need humor. Monroe certainly carries the bulk of it, but I’d like to think that Wu also contributes to that part of the show.”

OK, let’s focus on that “dark and scary” part for a minute. Reggie admits there’s “a lot to be tied up” as we head into the second half of season two, and he was kind enough to give us a glimpse into how that’s going to happen:

The Moments We’ve All Been Waiting For

“It’s going to come to a head in the first episode back,” Reggie reveals. “The captain finds the trailer, there’s a confrontation between Nick and the Captain, and there’s a pretty heavy sex scene.”

A heavy sex scene? Now that‘s what I call a return!

“We knew it was going to happen, and it took an entire day to get shot,” Reggie says of Renard (Sasha Roiz) and Juliette’s (Bitsie Tulloch) highly anticipated roll in the hay. “We all wanted to be in the bleachers for that one. I can pretty much tell you that Wu wasn’t in it. Unless it was an orgy, he was not in it. I can tell you I’m the first person to the scene after it happens — and there are literally, and figuratively, some cracks in the wall.”

Maybe next time, Wu. Maybe next time.

Wu Stumbles On A Secret

Reggie says the comment he receives most from Grimm fans is that they ”can’t wait until Wu finds out” — and it sounds like they might finally be close to getting their wish! Well, sort of.

“I don’t know how long they’re going to carry that on, but on an upcoming episode, I do see some wesen,” Reggie reveals. “And I see them in their true form!”

It’s official, I’ve got chills.

HollywoodLifers, how excited are you for Grimm‘s return? Drop a comment with your thoughts on Reggie’s reveals, as well as your predictions for the second half of season two! What do YOU hope happens next?

— Andy Swift

Follow @AndySwift

More Grimm on HollywoodLife.com:

1. ‘Grimm’ Guest Star Reveals Personal Connection To Halloween Episode
2. ‘Grimm’ Video: What’s Next For Hank’s ‘Season Of Discovery?’
3. ‘Grimm’ Season 2 Videos: Can Nick Handle His Mom AND Save Juliette?

Every episode of Grimm is borderline terrifying, but tonight’s Halloween-themed hour is especially so — and for guest star Kate del Castillo, the episode’s all-too-real villain “La Llorona” holds a special place in her nightmares. “Every single Mexicana has heard [the legend of] La Llorona,” Kate tells HollywoodLife.com of the Mexican folktale featured in the episode. ”It would scare the hell out of us!”

For those of you who aren’t properly educated in South American folklore, La Llorona is the ghost of a beautiful woman who killed her children to be with the man she loved — and as if that wasn’t tragic enough, the man still wouldn’t be with her. Now the spirit is said to be wandering the earth, seeking little children to snatch up. And that’s where Kate’s character, Valentina Espinosa, comes in.

“She’s a detective from New Mexico who’s obsessed with La Llorona because she lost her nephew,” Kate explains. “He was kidnapped under her watch, so for her, it became an obsession. That’s why she goes to Portland, to help the detectives find her. She knows the case.”

Juliette (Bitsie Tulloch) even gets to play translator and show of her Spanish-speaking skills, which Kate says are very impressive: “She did amazing!”

Kate’s appearance on Grimm is also meaningful to her as a Latina actress, because the episode will air in Spanish on Telemundo immediately after it airs on NBC. Kate recently starred on the Telemundo miniseries La Reina Del Sur.

“I’m their guinea pig,” Kate says. “Well, not me, but the episode. I think it’s genius! It’s time, and it couldn’t be better than with this episode, which is so Mexican. I’m honored and happy to be the one broadcasted by NBC and Telemundo for the first time.”

As an added bonus, we also have behind-the-scenes photos from the episode of Monroe (Silas Weir Mitchell) and his “haunted” house! (Oh, did you expect him to not be obsessed with Halloween?)

Grimm‘s Halloween episode airs at 9 p.m. tonight on NBC!

— Andy Swift

Follow @AndySwift

More Grimm on HollywoodLife.com:

1. ‘Grimm’ Video: What’s Next For Hank’s ‘Season Of Discovery?’
2. ‘Grimm’ Season 2 Video: Can Nick Handle His Mom AND Save Juliette?

I’m starting to think Aunt Marie was onto something when she warned newly Grimm’d Nick (Dave Giuntoli) not to let people get too close to him. In this behind-the-scenes video, obtained by HollywoodLife.com exclusively, Russell Hornsby looks forward to Hank’s “season of discovery” now that he’s in on the Wesen secret — but while he’s optimistic about the future for Nick’s partner, I can’t help but think it’s only going to make things worse for him.

I guess we’ll get our answer when Grimm returns with new episodes Sept. 28 on NBC!

Watch the video below, then weigh in with your take on Hank’s new situation:

— Andy Swift

Follow @AndySwift

More Grimm on HollywoodLife.com:

1. Fall TV’s 25 Hottest Couples: Rachel & Brody Vs. Stefan & Elena And More
2. ‘Grimm’ Season 2 Videos: Can Nick Handle His Mom AND Save Juliette?

While most of your favorite shows won’t be back with new episodes for more than a month, NBC’s Grimm is getting a jump on the fall schedule by launching its second season Aug. 13 — which is good, because Nick Burkhardt (Dave Giuntoli) definitely has an extra month’s worth of drama on his plate.

Not only is Nick still reeling from the surprise return of his presumed-dead mother Kelly (Mary Elizabeth Mastrantonio), but he’s also racing against the clock to wake Juliette (Bitsie Tulloch) from her cat scratch-induced coma.

Watch a special behind-the-scenes preview of Grimm‘s second season below:

And if you’re lost — which is understandable, given the ridiculousness of it all — watch this special 7-minute recap of season one:

— Andy Swift

Follow @AndySwift