In season two the opening words of the opening narration were changed from "10 years ago" to "In 1972"
The 1981 Bell JetRanger III 206B-III (N2044C, c/n 3363) is commonly used in other productions. Once a couple weeks ago (One More Time), but is best known as the Santini Air helicopter with a red white and blue paint scheme (Airwolf).
The Beatles record "Hey Jude" is mentioned by Murdoch and Face.