At Ray and Neela's apartment, Brett (Misha Collins) talks about the legend of American singer Robert Johnson selling his soul to the devil. Collins would later star in Supernatural (2005), as the angel Castiel, where this very story would become a major plot point of the Season 2 episode Crossroad Blues (2006), which introduced the crucial subplot of Crossroad Demons into the series.
Very early television appearance for Josh Gad (Sgt. Bruce Larabee), who is a singer and voice actor best known for his work in Frozen (2013) as the voice of Olaf the Snowman and in The Angry Birds Movie (2016) as Chuck. He is also a well known and award winning Broadway musical actor/singer, he was nominated for a Tony in 2011 for his portrayal of Elder Cunningham in the Broadway musical The Book of Mormon.
Here and There (2005) features guest star Raphael Sbarge, who tested for the role of Dr. John Carter during the pilot stage.
Steven Christopher Parker, who has a brief appearance as Gus, an ER patient, would return in Season 14 as medical intern, Harold Zelinsky.