As announced in December 2011, Karen Gillan and Arthur Darvill will leave the programme during the 33rd series in 2012, paving the way for a new female companion to join The Doctor on his adventures. So far, there has been no definite news concerning casting, but here are is my own list of actresses whom I would like to see sharing lead billing with Matt Smith.
Linzey Cocker ('Waterloo Road', 'Salvage')
Charlie May-Clark ('Just Henry', 'Clubbed')
Angela Holmes ('Shameless', 'Goldplated')
Shannon Tarbet ('Spur Of The Moment', 'George Gently')
Jessica Brown-Findlay ('Downton Abbey', 'Albatross')
Kirsty Leigh Porter ('Ashes To Ashes', 'The Bad Mother's Handbook')
Chelsie Padley (Tati's Hotel, 'The Story Of Tracy Beaker')
Eleanor Turner-Moss ('Towards Zero', 'Wild Child')
Hopefully, we won't have long to wait before an official announcement is made about who will take over from Karen. Once it is, I will post details here.