It wasnt until the 2005 reboot that the formula was finally changed.

But that doesnt mean that all ofDoctor Whos best companionscome from the modern era.

This wasnt the case with classicDoctor Who.

Doctor Who Season 14 Poster

This was another huge success, giving the show an emotional level that it never really had before.

These stories could be several hours in length, but they werent frequently connected to each other.

Without the Time War, modernDoctor Whowouldnt have been anywhere near as successful.

Tom Baker pointing at something in Doctor Who

New Who avoided this problem by focusing strongly on Gallifrey and the war.

This is another reason why the episodic format works so much better forDoctor Who.

While serials have their advantages, shorter episodes are much easier to digest on the whole.

A composite image of a Sea Devil in closeup in front of three Sea devils standing together in Doctor Who

The latest Doctor Who series introduces the Fifteenth Doctor, joined by new companion Ruby Sunday.

Since Disney has invested in the show,Doctor Whos reach has only become even broader.

Its become much easier to understand for audiences outside of Britain - and thatsboth a good and bad thing.

The Doctor and Rose look surprised in Doctor Who

Alex Kingston as River Song wearing an astronaut suit in Doctor Who

The Doctor tries to find an apartment from James Corden in Doctor Who

Millie Gibson as Ruby Sunday and Ncuti Gatwa as the Fifteenth Doctor looking nervous in Doctor Who

Doctor Who The Time War Daleks Vs. Time Lords Starships

The Doctor, Susan, Ian and the Daleks in Doctor Who.

The Doctor with the Girl in the fireplace in France in Doctor Who

The Doctor (Ncuti Gatwa) salutes towards the sky with his fingers, saying goodbye to Rogue in Doctor Who.

Sarah Jane Smith Smiling in Doctor Who School Reunion

Headshot Of Ncuti Gatwa In The US premiere of the new season of the Disney+ series Doctor Who

Headshot Of Millie Gibson In The US Premiere Of The New Season Of The Disney+ Series Doctor Who

Doctor Who