Taken from the Sci-Fi web-site
SCI FI Channel has acquired the fourth season of Doctor Who and its hit spinoff series The Sarah Jane Adventures from BBC Worldwide America. Both series are slated to premiere on SCI FI in April.
The Sarah Jane Adventures is written and produced by the same creative team behind Doctor Who, including multiple-award-winning writer Russell T. Davies. The series centers on Sarah Jane Smith (Elisabeth Sladen), former companion to the Doctor, who investigates offbeat mysteries with her young friends Maria, Luke and Clyde.
The fourth season of Doctor Who, meanwhile, brings back star David Tennant as the 10th Time Lord, joined by a new companion, Donna Noble (Catherine Tate), who reprises her role from the previous Christmas special. The Doctor's previous companion, Martha Jones (Freema Agyeman), also makes a triumphant return in the middle of season four.