Question: how many episodes are in series 4 of shetland
Answer: Series Episodes Originally aired First aired Last aired 10 March 2013 ( 2013 - 03 - 10 ) 11 March 2013 ( 2013 - 03 - 11 ) 6 11 March 2014 ( 2014 - 03 - 11 ) 15 April 2014 ( 2014 - 04 - 15 ) 6 15 January 2016 ( 2016 - 01 - 15 ) 4 March 2016 ( 2016 - 03 - 04 ) 6 13 February 2018 ( 2018 - 02 - 13 ) 20 March 2018 ( 2018 - 03 - 20 )