The 1980s drama stars John Nettles as the title character.
Two series are available to watch, as well as a number of Christmas specials.
Britbox, which launched in the UK in 2019, is joint venture of the BBC and ITV plc. It is a paid streaming service, which features a variety of British boxsets.
It is currently home to Spitting Image, after a new series was launched for the first time in more than two decades.