Trivia

As Spenser is driving to Betty's, you hear a voice on the radio giving an update on the recent murder of Captain Boylan. The person giving the update is director Peter Berg

Very loosely based on characters from Robert B. Parker's "Spenser" series of mystery novels.

Mark Wahlberg was paid $30 million, the biggest salary of his career.

The film featured the last appearance of Alan Arkin.

The fifth collaboration between director Peter Berg and Mark Wahlberg following Lone Survivor (2013), Patriots Day (2016), Deepwater Horizon (2015) and Mile 22 (2018). This is their second Boston-set film following Patriots Day (2016).