Viewers can catch the promo for the 50th anniversary special of Doctor Who at 8pm on BBC One following Strictly Come Dancing.
The Day of the Doctor stars series regulars Matt Smith and Jenna Louise Coleman alongside returning favourites David Tennant and Billie Piper.
The episode also features the Daleks and returning monsters the Zygons who made their only appearance in the original series in the 1975 serial Terror of the Zygons which starred Tom Baker, Elisabeth Sladen, Nicholas Courtney, John Levene and Ian Marter.
The Day of the Doctor airs worldwide on November 23rd and will also be shown in cinemas. It has an extended running time of 75 minutes and has been written by the show’s Executive Producer Steven Moffatt.