Picture a Play is a unique drama, based on photographs sent in by BBC World Service listeners. It is broadcast on Saturday 8 December.

Listeners around the world were invited to submit photographs from their mobile phones, with the chance for the best photos to be the inspiration for a short radio play.

The photos had to include the colour blue, a pair of eyes and something from the place where the listeners live.

A shortlist of 20 photos was sent to international photographer Greg Williams, who has now chosen his favourite four images. Click here to see the shortlist and click here to see his favourite four images.

Writers Marcy Kahan, Gurpreet Kaur Bhatti, Nick Warburton and Efo Kodjo Mawugbe have each chosen a photo as the starting point for their short dramas.

Lia Williams, Colin Stinton, Shiv Grewal, Adjoa Andoh and Larissa Kouznetsova star in these four surprising short plays, which include a love story, a chilling mystery, a comedy and a very surreal cruise.