This is the first time we see Leo's lightning powers.
Jim Abele, Piper's doctor, plays in Pretty Little Liars as Alison DiLaurentis' father. A show that Holly Marie Combs is also on and Wes Ramsey guest stars in.
With this episode, Rose McGowan officially surpasses the amount of episodes that Shannen Doherty appeared on the show (counting the unaired pilot). Shannen appeared in 67, this is Rose's 68th.
In the scenes when Gideon or Barbas are trying to kill Wyatt, the boy isn't actually in the scene, the actors Jason and Kristopher Simmons are infront of a green/blue screen so as not to scare them.