The Long Firm

The original novel, "The Long Firm", contained five stories. "Red Hot Poker", "Dissolution Honours", "The Rank Charm School", "Jack the Hat", and "Open University". The first episode of the television show, "Teddy's Story" was an amalgamation of "Red Hot Poker" and "Dissolution Honours". The episode "Ruby's Story" was an adaptation of "The Rank Charm School", "Jack the Hat" became "Jimmy's Story", and "Open University" became "Lenny's Story". In "Jack the Hat", the main support character was the factual Jack "The Hat" McVitie. For legal reasons, he could not be included, so the character of Jimmy was adopted from the first chapter of the book "Red Hot Poker", to replace Jack in this episode.

When Harry and Teddy go to Nigeria (in 1964), we see cars driving on the right-hand side of the road. Nigeria drove on the left until 1972.