<span class="SFPTagline"> From SCIFIPEDIA </span>

Doctor Who, Season 6 would be a tumultuous period for the program. Producer Peter Bryant started preparations for his own departure from the program mid season. To this end, he would begin training script editor Derrick Sherwin to replace him. This would create the need for a new script editor for the season's final stories. Terrance Dicks would step up to this job, a position he would hold for more than five seasons.

The budget for the program was becoming increasingly tight, forcing the team to produce longer and longer stories so that expensive sets and costumes could be used in more episodes. Other cost saving measures would be made in areas such a incidental music, which would be notably sparse this season.

Another problem was that both Bryant and Sherwin were also working on other projects this season, leaving them with little time to focus on Doctor Who.

There were also severe script problems this season. No less than four stories had to be discarded due to various problems and three replacements had to be penned at the last minute.

Concerned about typecasting and frustrated by the exhausting pace of taping 40+ episodes a season, lead actor Patrick Troughton announced that he would be leaving at the end of the season. Frazer Hines (Jamie) and Wendy Padbury (Zoe) would ultimately decide to leave with him.

Bryant and Sherwin began to feel that that the show's format was no longer working and started considering possible changes. Finally, they came to the conclusion that setting the show entirely on present day Earth would lend an immediacy and a reality to the show that it did not have while the Doctor wandered from world to world in various time periods. It would also save on costuming and sets since off the shelf clothes and real locations could be used more often. The formula they arrived at was to have the Doctor exiled on Earth and assisting Brigadier Lethbridge-Stewart, who had now become leader of the British division of an organization called UNIT. To test this format, they would have a dry run by having the Doctor assist UNIT in "The Invasion." Judging the experiment to be a success, they would carry out the Doctor's exile in the season's final story, "The War Games."

Although the season does not have the outstanding reputation among fans that the previous season does, "The Mind Robber," "The Invasion" and "The War Games" are considered great classics. Particulary, "The Invasion" a great Cyberman story that features the debut of UNIT and "The War Games" which at long last reveals the Doctor's own people, the Time Lords.

This season began airing in August of 1968. Ratings sank again this season, causing the BBC to seriously consider cancelling the program. Ultimately, Season 7 was given the go ahead only because a suitable replacement could not be found.

• The Dominators (5 episodes)
• The Mind Robber (5 episodes)
• The Invasion (8 episodes)
• The Krotons (4 episodes)
• The Seeds of Death (6 episodes)
• The Space Pirates (6 episodes)
• The War Games (10 episodes)