This series spawned an American remake in 2015 of the same name, Mad Dogs (2015). It too starred Ben Chaplin, but in a different role. In the US remake the Alvo character is renamed Milo and played by Billy Zane.
María Botto plays Maria, a police officer, and also played Sophia Moreno, a police officer, in Mad Dogs (2015).
Philip Glenister and John Simm have co-starred in four series together - Clocking Off (2000), State of Play (2003) Life on Mars (2006) and Mad Dogs (2011) and one film, Tu£sday (2008). They both starred in the series Prey (2014), but in separate seasons.
John Simm (Baxter), Philip Glenister (Quinn) & Marc Warren (Rick) also worked together on State of Play (2003) and Episode 9 (2007).
Marc Warren worked with Philip Glenister's brother Robert Glenister in Hustle - I signori della truffa (2004).