Doctor Who will be back on our screens on Saturday 5 April, with 13 new episodes.
In the Time Lord's fourth series since he returned in 2005, The Doctor, played by David Tennant, teams up again with Donna, played by Catherine Tate.
The pair first met in the 2006 Christmas special, The Runaway Bride.
Last year head writer Russell T Davies told CBBC Newsround that the first episode features: "the most unusual monsters we've ever created".
"(It's) the sort of creature we've never tried before," he added. The first episode is called Partners in Crime.
The series will also give us a chance to find out more about the Ood - last seen in the episodes The Impossible Planet and The Satan Pit.
But the most frightening story looks likely to be a double episode written by Steven Moffat, the man behind the scary statues in Blink.
Old friends are returning to The Tardis
CBBC Series Totally Dr Who won't be back this year, but there willl be some old friends returning to The Tardis.
Martha, (Freema Agyeman) who left The Doctor last summer, will be returning.
As will Rose (Billie Piper), who was stranded in another universe at the end of the second series.
And, who knows, some other favourite characters might well be coming back at some point in the series.