When filming the scene where Oliver Queen fights the recruits in the road, Stephen Amell (Oliver Queen) actually broke his nose.
Both the names Prometheus and Charon derive from Greek mythology. Prometheus was a Titan who gave man fire. Charon was the ferryman of Hades, carrying the souls of the dead to the underworld.
During a conversation around the 35-minute mark, a sign can be clearly seen in the background for the "Bam² Muay Thai Training Center." This episode was directed by supervising stunt coordinator James "Bam-Bam" Bamford.