One Night Stand

"" is the fourth episode of Season 3 of Grimm and the forty-eighth episode overall. It first aired on November 15, 2013 on NBC.

Press Release
When Nick and Hank investigate a drowning death with mysterious marks on the victim’s ankles, they happen upon a group of water-bound Wesen with a deadly postcoital cuddle. Meanwhile, Rosalee starts unpacking her things at Monroe’s, and Captain Renard makes a startling realization about the possible identities of the Royal Baby’s parents.

Wesen

 * Blutbad
 * Fuchsbau
 * Half-Zauberbiest
 * Naiad

Production Notes

 * Filming for the episode began on August 16, 2013.