“The Mysterious Planet” is the first adventure of the twenty-third season, known by the global title “The Trial of a Time Lord”, which aired in 1986 featuring the Sixth Doctor and Peri. It’s a four parts adventure written by Robert Holmes and directed by Nicholas Mallett.
“The Deadly Assassin” is an adventure of the fourteenth season of the “Doctor Who” classic series aired in 1976 featuring the Fourth Doctor. It’s a four parts adventure written by Robert Holmes and directed by David Maloney
“The Twin Dilemma” marks the Sixth Doctor’s debut. Together with him there’s his companion Peri. It’s a four parts story written by Anthony Stevens and directed by Peter Moffatt.
The Doctor Who Magazine confirmed the extras that will be included in the edition of classic Doctor Who series adventures “The Ark” and “The Mutants” that will be published on DVD in early 2011.