Launched today, the 'Doctor Who: Present Time' app on the Doctor Who Facebook page, run by commercial arm BBC Worldwide, is giving away special treats every day this festive season.
Fans have to 'like' the page and then they can enter the "Time Vortex", where hundreds of Doctor Who gifts have "been lost across space and time".
Hunting down the presents involves finding up to ten boxes over a 24-hour period, and then opening them to see if they contain a gift.
As well as instant-win prizes, you can pick your favourite Doctor Who gift from the BBC Shop Carousel for the chance to win them in the vortex.
Photo gallery - 'The Snowmen' Christmas special:
Copyright: BBC Adrian RogersIf you invite a friend to join in the hunt for gifts, then the chances of winning are increased. If the friend finds the gift, then you both win.
Prizes include the Sonic Screwdriver Universal Remote Control; a Playstation 3 console with Doctor Who: The Eternity Clock; tickets to the Doctor Who Experience; an Amazon Kindle Fire with Doctor Who eBooks; and the latest Doctor Who DVDs, toys and books available this Christmas.