Give a stream of consciousness and then the final answer. Mark Gilbert McKinney, known professionally as Gil McKinney, (born February 5, 1979) is an American film and television actor. He is best known for playing Dr. Paul Grady on ER, Derek Bishop on Friday Night Lights, and Prince Eric in Once Upon a Time, and for being the voice and face (via MotionScan) of Jack Kelso in the video game L.A. Noire. Gil also appeared in Supernatural as Henry Winchester.

Based on this passage, who plays eric on once upon a time?
To answer the question, consider the following: He is best known for playing Dr. Paul Grady on ER, Derek Bishop on Friday Night Lights, and Prince Eric in Once Upon a Time, and for being the voice and face (via MotionScan) of Jack Kelso in the video game L.A. Noire.
So, the final answer is .