TVLine
http://tvline.com/2014/01/23/about-a-boy-adrianne-palicki-fnl-reunion-nbc/
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Per TVLine, Sam Witwer (who in real life is a close friend of “Grimm” star David Giuntoli) will play a tortured soul named Maximillian, who is the main attraction at a carnival. With each performance he is getting dangerously closer to sacrificing the last of his humanity.
As soon as we find out which episode Witwer will be appearing in, we’ll be sure to let you know.
For more info in the meantime, visit “Grimm” on NBC.com, check out some InstaGRIMMS on Instagram, “like” “Grimm” on Facebook, and follow “Grimm” on Twitter.