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Tiger Cubs, alternatively titled Special Duties Unit, is a Hong Kong police procedural television series produced by Lam Chi-wah and TVB. It premiered on Sunday, 24 June 2012 on Jade and HD Jade, and was the first TVB drama to broadcast in the Sunday night time slot since 1995's File of Justice. Tiger Cubs was one of six TVB dramas that were promoted at the 2011 Hong Kong Internal Film and TV Market. Tiger Cubs debuted its trailer at TVB's Programme Presentation 2012 event on 1 November 2011. The drama is renewed for a sequel in early 2013, with a production of 20 regular episodes. Filming for the second series began in June 2013.