The best episode directed by Kevin Parks is "Trial and Error", rated 7.722/10 from 18 user votes. It was "written by Andrew Dabb". "Trial and Error" aired on 2/13/2013 and is rated 0.4 point(s) higher than their second highest rated, "Bad Boys".
Kevin deciphers the tablet and figures out how to close the gates of Hell. He tells Sam and Dean that according to the tablet one person must face a series of three tests designed by God. The first one – kill a hellhound. Sam and Dean argue over who should complete the trials.
Director: Kevin Parks
Writer: Andrew Dabb
Sonny, a man who runs a boy's home, calls Dean in after a mysterious death occurs. When Sam wonders how his brother knows Sonny, Dean explains that he spent two months there when he was 16 after being arrested for theft.
Director: Kevin Parks
Writer: Adam Glass