The 1971 Jon Pertwee story Colony in Space, has been scheduled for release on DVD in the UK on 3rd October this year.
The story by Malcolm Hulke, sees the third Doctor, along with companion Jo Grant, sent to the planet Uxarieus by the Time Lords, where they discover a struggling colony being terrorised by giant reptiles.
The six part story was originally shown between 10th April and 15th May 1971. Katy Manning plays Jo Grant and Roger Delgado appears as the Master.
Other members of the cast include John Ringham in his third role in the series, Helen Worth, who went on to play Gail McIntyre on the soap opera Coronation Street, Bernard Kay and Tony Caunter.
The single disc release will contain 4 seconds which were missing from VHS & US masters of the story and which restores 2 lines of dialogue.