[s1e21] Big Feet -

is the 21st episode of the first season of the supernatural drama series Grimm , which originally aired on May 11, 2012 .

[Discussion] S01E21 "Big Feet" May contain spoilers : r/grimm [S1E21] Big Feet

: The "secret" world of Wesen begins to unravel for Nick’s inner circle. Hank Griffin witnesses a transformation (Voga) that he cannot logically explain, and Juliette’s veterinary DNA analysis of hair samples points toward "parahuman" hybrids. Cast & Crew Director : Omar Madha Writer : Richard Hatem Guest Stars : Roger Bart as Dr. Constantine Brinkerhoff Kenneth Mitchell as Larry McKenzie is the 21st episode of the first season