The San Francisco Police Department does not use the title of detective for investigators. They are instead called inspectors.
Despite the character being an American, there are many instances where the actor playing the Warden's (Jonny Coyne) accent shows off his London, England roots.
Sam Neill plays the elder Hauser. He is 5 foot 11 inches tall. Greyston Holt plays the younger Hauser and is noticeably taller in scenes with Parminder Nagra since he is 6 feet 2 inches tall. Likewise, the old and young Ray actors have a noticeable height difference. The older Ray played by Robert Forster is 5 feet 9 inches tall, while the younger Ray played by Robbie Amell is 6 feet tall.