Maggie names her baby Johnny after her former lover Johnny Lewis, which was also the name of Johnny Lewis who portrays the unsub in Zoe's Reprise (2009). Johnny Lewis was an actor who ended up killing his neighbor and her cat. The police first assumed it was because he was high on drugs but later discovered he had suffered a traumatic brain injury when he was in a crash, which they say contributed to his behavior.
When trying to convince Tommy that age gaps are okay and being 13 and in love is fine, she tells him Henry VIII's first wife was "much" older. Henry VIII's first wife was Catherine of Aragon and she was only 6 years older than Henry VIII.
Teri Polo and Thomas Gibson also starred together in Heartbreak (1995). She was a guest star while he was a main character.