From Classical Gallifrey
Companion: Jamie, Victoria
Written By: David Whitaker
Directed By: Derek Martinus
Background & Significance: The first four seasons of Doctor Who saw the show at its first peak of being "super popular". It happened early on and virtually almost overnight when The Doctor and his crew first went up against "The Daleks". Now I don't need to tell you because you already know, but The Daleks were popular. No like really. Super mega popular. There were Dalek toys and games and vernacular. The whole country had been seized by Dalekmania.
And Terry Nation was smart enough to know this.
Because of their popularity, Terry Nation wanted to create a Dalek show, milking all he could out of his greatest creations. He pitched and wrote an idea for the BBC which would have featured Sara Kingdom and spun out of "The Daleks Master Plan". The BBC rejected the idea (although a production of the story was later released by Big Finish just over a year ago...) and Terry Nation turned to the United States to see if they'd be interested. Because The BBC realized that Nation wanted to go a separate way, they decided to write The Daleks out of Doctor Who for good and planned for the end of the show's fourth season.
But even beyond that, it's a turning point for the show. It's the first story that really (and I mean really) utilizes the fantastic team of 2nd Doctor/Jamie and it's the first appearance of Victoria. So... yeah. Turning point.
Read the full review here