Doc Martin, one of UK's iconic TV characters, hangs up his stethoscope for the final time as the long-running titular series comes to an end. This one-hour retrospective spotlights the longevity and impact locally and around the world of Doc Martin over the years, as well as offering behind the scenes of the final season with the cast and crew. From scripting and pre-production to shooting and delivery, meet the regular characters that live and work in the picturesque Cornish town of Portwenn, the key crew behind the camera, the residents of Port Isaac, the show's real-life setting, and the visitors who come solely because Doc Martin films there.

Unexpectedly widowed, prim and proper housewife Grace Trevethyn finds herself in dire financial straits when she inherits massive debts her late husband had been accruing for years. Faced with losing her house, she decides to use her talent for horticulture and hatches a plan to grow potent marijuana which can be sold at an astronomical price, thus solving her financial crisis.