Ben and Steve are in Dubai, which, having only been built within the last 40 years, is one of the world most modern cities. They have 48 hours to get a photo that no one else has of the city. Their Mission Selfie hashtag challenge? #unreal.

Ben and Steve travel to the remote Isle of Mull on the west coast of Scotland. Famed for its variety of wildlife on land and sea, this episode's challenge is to capture just that. Their hastag challenge for this week is #agaisnttheodds.

Ben and Steve arrive in Reykjavik, Iceland. They still have only 48 hours for the mission, but now have to complete it in extremely cold terrain. Their new hashtag challenge? #LightintheDark

Is it possible to take a unique photo of Berlin, one of the most photographed cities?

Ben and Steve set off to get a #unique photo on the fully-sustainable, remote island of El Hierro, one of the the Canary Islands. Here for only 48 hours, their challenge is to get a photo of the island that no one else has.