Latest/Next UK TV Air Date: No exact date/time - Unknown 2021 (TBC)
UK Channel: BBC One
Season 1 – BBC1 – 10 March 2013 at 9pm
Season 3 – BBC1 – 15 January 2016 at 9pm
Season 4 – BBC1 – 13 February 2018 at 9pm
Latest/Next US TV Air Date: No exact date/time - Unknown 2020 (TBC)
US Channel: Britbox
This "never miss" feature allows you to enter your email address and receive updates about 'Shetland' whenever the premiere date or renewal information on this page changes.
Where To Watch Shetland
Country of Origin: UK
A murder-mystery set in… well… guess where… starring Douglas Henshall ('Primeval'). Season 6 is filming in 2020, so may land late 2020 or early 2021.
Filming on series 4 of Shetland (BBC1) due to start in early 2017, for broadcast later this year.
Source: Interview with author Ann Cleeves on 'A Stab in the Dark' podcast.
Reply to MartyM
Update: Filming underway
http://www.bbc.co.uk/mediacentre/latestnews/2017/shetland-filming