As BBC America announces,Â Adrian Scarborough and Garrick Hagon are going to be special guests in Doctor Who, season 7.
Adrian Scarborough is currently starring in Upstairs Downstairs, but he’s also known for the role in Gavin & Stacey. He will appear as special guest in the third episode in the season 7 (as Kahler-Jex), along withÂ Ben Browder, Dominic Kemp (asÂ Kahler-Mas) and Rob Cavezos (as Walter).
I am not sure in which episode Garrick Hagon will appear, but he have appeared once before in Doctor Who as a character called Ky in The Mutants in 1972. He is know for rebel Biggs, a friend of Luke Skywalker in Star Wars.