Celebrating twenty years of the popular archaeologist character first introduced in the Doctor Who New Adventures books, one-off drama Bernice Summerfield: Many Happy Returns reflects elements of Bernice's entire life and reunites her with a whole host of familiar faces.

'I was overwhelmed by how many people wanted to be involved with the project,' says producer Scott Handcock. 'Not only actors, but writers, sound designers, Toby at the Moat Studios - everyone! Everyone gave their time for Jac Rayner and her charity, Invest in ME, and this adventure has been truly worthwhile to pull together on every level!'

Invest in ME works to raise awareness and funding into research of ME, a serious neuro-immune condition that affects 250,000 people in the United Kingdom. Its latest project - Let's Do It For ME! - is a patient-driven campaign raising vital funds for a Centre of Excellence at the University of East Anglia. The centre aims to translate scientific findings and evidence from research into applicable treatments for people suffering from ME, focusing on immunology and virology.

The hundred-minute adventure is available to download now, and every penny from sales will go to supporting Invest in ME and its projects. Click on the product page now to order, and for full details of the cast and crew who have come together to celebrate Bernice's birthday!