Fans of BBC1 drama Luther have been invited to upload postcards to appear in the show when it returns for a third series later this year.

Visitors to the show’s site, along with its 12,500 Twitter followers and 177,000 Facebook friends, were invited to imagine the locations visited by lead character and Luther nemesis Alice when she departed on a world trip at the end of series two.

Producers have requested original photographs or drawings featuring appropriate places Alice might visit that begin with the letter M to ensure they are in keeping with the storyline, and including a short message written from Alice to Luther.

Five of the best postcards, chosen by the show’s writer and creator Neil Cross, will feature on the pinboard in Luther’s flat and appear on screen during the forthcoming series, with a selection of others displayed on the show’s social media profiles.

The competition follows the launch of four graphic novels that were released to support the second series of the BBC1 crime drama.