Supernatural » Season 4 » Metamorphosis (Episode)

Ron Lea is a Canadian actor, best known for his roles in Doc, Street Legal, and This is Wonderland. Lea also served as a director on some episodes of Doc.

Dameon J. Clarke (born January 16, 1972 in Mississauga, Ontario, Canada) is a Canadian-American actor who has done work for anime, films, TV shows and video games. His voice acting roles have been with Funimation, where he voiced Cell in the Dragon Ball series, George Kaminski in Case Closed, Younger Toguro in Yu Yu Hakusho and Scar in Fullmetal Alchemist. In video games, he voices Handsome Jack in the Borderlands series. On camera, he has appeared in TV shows such as Graceland, 24, Castle, Supernatural and Prison Break. He also starred in the indie film How to Be a Serial Killer, for which he won several awards at film festivals.

Genevieve Padalecki (née Cortese) , (born January 8, 1981), is an American actress. She appeared in the television series Wildfire as Kris Furillo and had a recurring role in Supernatural as the demon Ruby.

Jensen Ross Ackles (born March 1, 1978) is an American actor, singer and director. He has appeared on television as Dean Winchester in The CW horror fantasy series Supernatural, Eric Brady in Days of Our Lives, which earned him several Daytime Emmy Award nominations, Alec/X5-494 in Dark Angel and Jason Teague in Smallville. He also starred as the lead in the box office success My Bloody Valentine 3D and provided the voice of Jason Todd in the popular animated film Batman: Under the Red Hood.

Jared Tristan Padalecki (born July 19, 1982) is an American actor. He is best known for playing the role of Sam Winchester in the TV series Supernatural. He grew up in Texas and rose to fame in the early 2000s after appearing on the television series Gilmore Girls as well as the films New York Minute (2004) and House of Wax (2005).