When it was announced in the summer of 2011 that both NBC and ABC were developing television shows based on the classic fairy tales, an immediate rivalry between Grimm and Once Upon a Time was assumed to occur by the media. After both shows premiered it became quickly obvious that tonally they were radically different shows.
The CW's Supernatural is a better match against Grimm. They are tonally and serially similar, sharing the same audience and even the same time slot in Grimm's first season before Supernatural changed nights the year after.
Fake Nationality: Nick is German American, but David Giuntoli looks as Italian American as the day is long.
Fan Nickname: Captain Renard aka "Captain No Pants." To be fair, Sasha himself started it in response to David's (Nick) shirtless scenes during a friendly challenge on who could get the most twitter followers.
Let's not forget Hansen in the same episode was Rex Salazar.
Danielle Panabaker plays a dragon. She was in Sky High, among other things. She also went from Hollywood Nerd in Sky High to growing up and filling out into a skimpy dressed fire dancer. So there's that.