An exclusive DVD preview trailer for the upcoming release of The Keys of Marinus (1966) has been included within the recently released The Twin Dilemma DVD ahead of its release later this month. The Keys of Marinus, written by Terry Nation, featured William Hartnell as the First Doctor with Carole Ann Ford, Jacqueline Hill and William Russell as companions Susan Foreman, Barbara Wright and Ian Chesterton respectively.
Extras for the release of The Keys of Marinus include: Commentary, The Sets of Marinus, Photo Gallery, Coming Soon - The Dalek War, Programme Subtitles and Subtitle Production Notes. The Keys of Marinus commentary features actors William Russell, Carole Ann Ford, director John Gorrie and designer Raymond Cusick with moderation by Clayton Hickman.
2lEntertain will release The Keys of Marinus on DVD for the price of £19.99 around the United Kingdom and Ireland on the Twenty First of September. The Third Doctor stories Frontier in Space (1973) and Planet of the Daleks (1973), titled Dalek War, will be released by 2lEntertain on the Fifth of October for the price of £34.99 around the United Kingdom and Ireland.