GRIMM - NBC VIDEO: 'Lonelyhearts' Episode Trailer Airs Friday, November 18, 2011 at 9/8C
On the next Grimm, a new monster emerges that proves to be untouchable.
Monroe (Silas Weir Mitchell) goes undercover to get a whiff of a hypnotic suspect for Nick (David Giuntoli); a stranger seeks revenge for the death of a friend who was killed by a Grimm.
After investigating a string of disappearances and bizarre female murders, Monroe is sent undercover to investigate a particularly hypnotic suspect, while a stranger seeking to avenge his friend's death comes searching for Grimm.
Guest stars include Josh Mead.