Doctor Who will be reunited with one of his long-lost companions in the next series - a robot dog called K9.
K9 is a rusty, trusty friend of the Time Lord's from years back. He starred alongside the fourth Doctor, played by actor Tom Baker, in the 70s.
K9, who was really popular with early Doctor Who fans, is back to join the new Doctor, played by David Tennant.
Producer Phil Collinson said: "I hope the new generation of viewers will fall in love with him in the same way."
The next series of Doctor Who starts in the spring of 2006.
The robot dog will be joined by one of the Doctor's early human companions too - a character called Sarah Jane Smith. She'll be played by the same actress who played her in the 70s - Elisabeth Sladen.
Sarah Jane and K9 will join the Doctor, Rose and Mickey in fighting the evil Krillitanes in one episode.