The four-day event, which will be held in Brighton next week, will be the first of its kind to go completely digital and will offer buyers from around the world the chance to view around 1,000 hours of new programming.
Highlights of this year's offerings include David Attenborough's swansong for his Life... series, Life in Cold Blood. There will also be the timely co-production Wild China, which airs this year in the run up to the 2008 Olympics in Beijing.
New British comedy on offer includes Never Better and the award-winning Gavin and Stacey.
Contemporary drama hit Mistresses and Ashes to Ashes, the follow-up to Life on Mars, will feature alongside period drama such as Cranford, Lark Rise to Candleford, Jekyll and Oliver Twist.
Science programming includes Moonshot, which celebrates the 40th anniversary of the lunar landing, as well as Oceans and Earth: The Power of the Planet.
In the Night Garden is the new jewel in the crown of BBCW's children's programming and sitting alongside it will be new CGI series Animalia.
BBW has also been developing its own formats and on offer will be quiz show Brainbox, which replaced The Weakest Link on BBC2, and BBC3's model hunt Find Me the Face.
Speaking about its move to digital, BBCW managing director for global TV sales Steve Macallister said: “This is another example of how we are investing heavily in becoming a tape-free business.
“We aim to digitise all current and back catalogue in order to protect quality and improve delivery across a wider range of devices.
“Our new digibooths bring a whole new level of sophistication to the vent that enables us to tailor Showcase viewing to each buyer individually.”
Over 5,000 hours of programming have now been digitised, a five-fold increase since the beginning of 2007.
BBC Showcase will be held at the Brighton Centre from 24-27 February.