Twin horses featured in this episode are called Castor's Folly and Pollock's Dream, according to signs on their stalls. In Greek and Roman mythology, Castor and Pollux (not Pollock) were twins who were transformed into the constellation Gemini ("The Twins").
Red-haired actresses: Christina Cox, Olesya Rulin.
Christina Cox also appeared in a horse-themed episode of the show Bones (season 3's "Death In The Saddle").
Amanda Righetti previously used her equestrian skills to portray a horse riding teen, who discovered a body in the opening scene of the "CSI: Crime Scene Investigation" episode "You've Got Male".
Christina Cox and Jim Beaver appeared together in the web series Nikki & Nora: The N&N Files (2013) which ran for one season on the LGBTQ streaming platform "Tello Films," although they share no screen time in this episode.