<P> The BBC confirmed in September 2011 that a further two series, each of ten episodes, had been commissioned, to be broadcast in 2012 and 2013 . James Bolam, who played the part of Jack Halford, left the show, claiming that it had "become stale", making his final regular appearance in the first episode of Series 9 and a guest appearance in Series 10, episode 8 . In the fourth episode, Denis Lawson joined the cast, as the new character of retired DI Steve McAndrew . Prior to the ninth series premiere, both Amanda Redman and Alun Armstrong announced that they would be leaving the show after the tenth series . The first programme of series nine was broadcast on 27 August 2012, and gained 8.52 million viewers, which was the highest rating of the week . Only Fools and Horses actor Nicholas Lyndhurst and former EastEnders actress Tamzin Outhwaite appeared in Series 10, which was broadcast in Britain between 30 July and 1 October 2013 . The opening episode of the tenth series gained an audience of 8.86 million viewers, making it the twelfth most watched programme of the year . </P> <P> Filming for Series 11 began in late 2013, and Episode 1 of the series was broadcast at 21: 00 GMT on BBC One and BBC One HD on 18 August 2014 . Ratings fell considerably from season 10 to season 11 when most of the original cast left; season 10 had an average per - episode viewership of 8.35 million, while season 11 managed an average per - episode viewership of 5.75 million . </P> <P> A twelfth series of the show began filming in the Autumn of 2014, and started broadcasting on 4 August 2015 . It was also revealed that Dennis Waterman would be leaving the series in the early episodes . In February 2015 it was announced that the twelfth series would be the last (Shot at West London Film Studios). </P> <P> The series is broadcast in at least twenty - five countries, and is also available on DVD and via online streaming . New Tricks was produced by Headstrong Pictures for the BBC . It was formerly produced by Wall to Wall Television between 2003 and 2014 . </P>

Cast of tonight's episode of new tricks