Trivia / Dirty John

• Approval of God: The real Debra and Terra and John's ex-wife Tonia and daughters Emily and Abby have all supported and approved of the series and the actors' portrayals of them and Eric Bana's portrayal of John.
• Channel Hop: The first season aired on Bravo in the USA, while the second season, subtitled Betty: The Betty Broderick Story, aired on USA Network.
• Fake American: The Australian Eric Bana as John Meehan, British Juno Temple as Veronica and Canadian Kevin Zegers as Debra's nephew Toby. Season 2 casts the British Chris Mason as the young version of Dan.
• Real-Life Relative: Shea Whigham plays John's father in flashbacks and his daughter Giorgia plays the teen version of John's sister Denise.
• Real Song Theme Tune: In Season 2, the first episode's theme song is "When You Were Mine" by Cyndi Lauper.
• Separated-at-Birth Casting: Chris Mason in Season 2 bears a strong resemblance to Christian Slater and imitates his unique voice and accent perfectly, making it easy to believe they are the same person decades apart.
• Variations on a Theme Song: Season 2's theme song starts as "When You Were Mine" by Cyndi Lauper. Over the course of the season, the theme song is replaced with a similar-sounding upbeat '80s tune before gradually degrading to ominous droning.