Get ready for answered questions as Lost's Man in Black gets Grimm

Get ready for some Grimm Man in Black-type action and some big answers on tonight's episode of the NBC show, according to the show's executive producers, David Greenwalt and Jim Kouf and main star David Giuntoli.

Titus Welliver pops up on Grimm as a character named Farley Holt, who must have kept some of Welliver's Smoke Monster transformational abilities from Lost, because he can turn into a steinadler or golden eagle.

In the episode, "Three Coins in a Fuchsbau," "some ancient and unbelievably valuable coins are discovered via a robbery, and these coins have the power to do all kinds of cool and cruel things to people. And whoever holds the coins has this sort of charismatic power, but it also drives you crazy," said Greenwalt.

"These coins have helped spark some of history's worst nightmares," added Kouf.

"From Caligula to modern times. And there's a huge surprise at the very end of the show. Like a season-ender level of surprise at the end of the episode."

In the episode, "Nick's going to be learning a lot about his past," said Giuntoli, who plays lead Grimm, a cop named Nick Burkhardt. "And it helps, I think, put some things to bed for him, some worries he's always had, some things he's always wanted to know. He understands his role a little bit more now. He's not as terrified by his new identity, and he's kind of using it as a tool, his Grimm-stincts, as I like to call them, and his powers."

As for working with Welliver, "First of all, Titus is a brilliant actor. And it was wonderful having him with us. His character brings Nick some news about his family and his past. I don't want to get too far into it. I don't know how deep into it I can go. But suffice it to say I learned some big, chunky pieces of info from Titus," said Giuntoli.

Tonight's episode "really drives the overarching storyline forward and answers some questions for my character and for the viewers. And we're going to get a lot more of that as the season goes on."

Here's a look at "Three Coins in a Fuchsbau":

Grimm airs on NBC at 9 p.m. on Fridays.

Are you looking forward to some Titus Welliver on Grimm?

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