Pond Life, penned by Chris Chibnall, will be available to watch on the BBC Doctor Who website and YouTube channel.
The adventure has been split into five episodes, which will be uploaded daily from noon on August 27 until August 31.
It will focus on Amy (Karen Gillan) and Rory (Arthur Darvill), and the "chaos" caused when the Doctor (Matt Smith) "drops in and out of their lives".
The BBC confirmed that Gillan, Darvill and Smith will all star in the adventure and also promised some "unexpected surprises".
"Pond Life provides us with a lovely opportunity to catch up with Amy and Rory since we saw them at the end of the last series," Chibnall said.
"It opens with the Ponds at home and gives us an insight to just what happens when the Doctor drops in and out of their lives. Travelling with the Doctor is one of the greatest things you can do, but it's fun to spend a few moments looking at the chaos he can also bring."
Meanwhile, Doctor Who's executive producer Caroline Skinner described Pond Life as "beautiful, heartfelt and wickedly funny", saying: "It's not long till the series itself will be back with a vengeance - but in the meantime Pond Life is a truly heartwarming piece about our best-loved companions and their madcap relationship with their raggedy Doctor."
Doctor Who will return for its seventh series on September 1, both in the UK and in the US.
Watch the cast and crew speaking about the upcoming Doctor Who 50th anniversary to Digital Spy below: