Chief of Detectives Ron Dean tells Torillo, after he is served a subpoena, only he and the Commissioner are behind him. The title of Commissioner was dropped for Superintendent, the title still used today.
Approximately 43 minutes into the episode, while Torello and his group are on the golf course, a white car drives by in the background. It's a GM Cutlass or Buick type product from the 1980s. The show is set in the 1960s.
When Torello and Inger walk through Inger's apartment in the episode "Strange Bedfellows", the shadow of the boom mic is visible on the wall behind them.