From TARDIS Index File, the free Doctor Who reference.

A list of companions of the Doctor. The definition of "companion" varies. Note that many companions have appeared in multiple media, i.e. first television, then comics and books. This main list includes any characters described in BBC publicity as a companion.

Contents 1 Main list 1.1 Television 1.1.1 First Doctor 1.1.2 First and Second Doctors 1.1.3 Second Doctor 1.1.4 Third Doctor 1.1.5 Third, Fourth and Tenth Doctors 1.1.6 Fourth Doctor 1.1.7 Fourth and Fifth Doctors 1.1.8 Fifth Doctor 1.1.9 Fifth and Sixth Doctors 1.1.10 Sixth and Seventh Doctors 1.1.11 Seventh Doctor 1.1.12 Eighth Doctor 1.1.13 Ninth Doctor 1.1.14 Ninth and Tenth Doctor 1.1.15 Tenth Doctor 1.1.16 Eleventh Doctor 1.2 Comics 1.2.1 First and Second Doctors 1.2.2 Third Doctor 1.2.3 Fourth Doctor 1.2.4 Fifth Doctor 1.2.5 Sixth and Seventh Doctors 1.2.6 Seventh Doctor 1.2.7 Eighth Doctor 1.2.8 Tenth Doctor 1.3 Prose fiction 1.3.1 Annuals 1.3.2 First Doctor 1.3.3 Novels 1.3.3.1 Virgin New Adventures 1.3.3.2 Seventh Doctor 1.3.3.3 Virgin Missing Adventures 1.3.3.4 Sixth Doctor 1.3.4 BBC Eighth Doctor Adventures 1.3.4.1 Eighth Doctor 1.3.5 BBC Past Doctor Adventures 1.3.5.1 Second Doctor 1.3.6 Tenth Doctor Adventures 1.3.6.1 Tenth Doctor 1.3.7 The Darksmith Legacy 1.3.7.1 Tenth Doctor 1.3.8 Short fiction 1.3.8.1 Telos Doctor Who Novellas 1.3.9 Seventh Doctor 1.3.9.1 Other short fiction 1.4 Audio 1.4.1 BBC Radio 1.4.1.1 Third Doctor 1.4.1.2 Eighth Doctor 1.4.2 Big Finish Productions 1.4.2.1 Fifth Doctor 1.4.2.2 Sixth Doctor 1.4.2.3 Seventh Doctor 1.4.2.4 Eighth Doctor 1.5 Webcasts 1.6 Seventh Doctor 2 Disputed as companions 2.1 Television 2.1.1 First Doctor 2.1.2 Second Doctor 2.1.3 Second, Third and Fourth Doctors 2.1.4 Third Doctor 2.1.5 Eighth Doctor 2.1.6 Ninth and Tenth Doctors 2.1.7 Tenth Doctor 2.2 Books 3 Companions of non-canonical Doctors 3.1 Theatrical films 3.1.1 Dr. Who 3.2 Stage plays 3.2.1 Doctor Who and the Daleks in Seven Keys to Doomsday 3.2.1.1 Alternative Fourth Doctor 3.3 Comics 3.3.1 the Doctor (AudioVisuals) 3.3.1.1 Party Animals 3.3.1.1.1 Notes 3.4 Television 3.4.1 The Curse of Fatal Death 3.5 Webcasts 3.5.1 Scream of the Shalka 3.5.1.1 Alternative Ninth Doctor 4 Special cases 4.1 Theatrical plays 4.1.1 Doctor Who: The Ultimate Adventure 4.1.1.1 Various 4.1.1.1.1 Notes

Main list

Television

First Doctor

• Susan Foreman
• Ian Chesterton
• Barbara Wright
• Vicki Pallister
• Steven Taylor
• Katarina
• Sara Kingdom
• Dodo Chaplet

First and Second Doctors

• Polly Wright
• Ben Jackson

Second Doctor

• Jamie McCrimmon
• Victoria Waterfield
• Zoe Heriot

Third Doctor

• Dr. Elizabeth "Liz" Shaw
• Josephine "Jo" Grant

Third, Fourth and Tenth Doctors

• Sarah Jane Smith

Fourth Doctor

• Harry Sullivan
• Leela
• K-9 Mark I
• K-9 Mark II
• Romana
  • First incarnation
  • Second incarnation

Fourth and Fifth Doctors

• Adric
• Nyssa of Traken
• Tegan Jovanka

Fifth Doctor

• Ensign Vislor Turlough
• Kamelion

Fifth and Sixth Doctors

• Peri Brown

Sixth and Seventh Doctors

• Melanie Bush

Seventh Doctor

• Dorothy "Ace" McShane

Eighth Doctor

• Grace Holloway

Ninth Doctor

• Adam Mitchell

Ninth and Tenth Doctor

• Rose Tyler
• Jack Harkness

Tenth Doctor

• Mickey Smith
• Jackie Tyler
• Martha Jones
• Astrid Peth
• Donna Noble
• Christina de Souza

• Adelaide Brooke
• Wilfred Mott

Eleventh Doctor

• Amy Pond

Comics

First and Second Doctors

• John and Gillian

Third Doctor

• Arnold

Fourth Doctor

• Sharon Davies

Fifth Doctor

• Sir Justin
• Shayde
• Gus Goodman

Sixth and Seventh Doctors

• Frobisher

Seventh Doctor

• Olla
• Ly-Chee

Eighth Doctor

• Stacy Townsend
• Ssard
• Izzy Sinclair
• Fey Truscott-Sade
• Kroton
• Destrii
• Chantir

Tenth Doctor

• Majenta Pryce
• Heather McCrimmon
• Wolfgang "Wolfie" Ryter

Prose fiction

Annuals

First Doctor

• George Mortimer
• Helen Mortimer
• Alan Mortimer
• Ida Mortimer

Novels

Virgin New Adventures

Seventh Doctor

• Bernice "Benny" Summerfield
• Roslyn "Roz" Forrester
• Christopher Rodonante Cwej
• Wolsey

Virgin Missing Adventures

Sixth Doctor

• Grant Markham

BBC Eighth Doctor Adventures

Eighth Doctor

• Samantha Jones
• Fitz Kreiner
• Compassion
• Miranda Dawkins
• Anji Kapoor
• Beatrice "Trix" MacMillan

BBC Past Doctor Adventures

Second Doctor

• Lady Serena

Tenth Doctor Adventures

Tenth Doctor

• Emma
• June
• Nikki Jupiter
• Rok Ma
• Koral
• Space Major Jon Bowman
• Jake Carstairs
• Vienna Carstairs
• Wallace Fitch
• Emily Parr
• Kate Maguire

The Darksmith Legacy

Tenth Doctor

• Gisella

Short fiction

Telos Doctor Who Novellas

Seventh Doctor

• Catherine "Cat" Broome

Other short fiction

tbc

Audio

BBC Radio

Third Doctor

• Jeremy Fitzoliver

Eighth Doctor

• Lucie Miller

Big Finish Productions

Fifth Doctor

• Thomas Brewster
• Erimem
• Amy

Sixth Doctor

• Dr. Evelyn Smythe
• Charlotte "Charley" Pollard

See note below

• Jamie McCrimmon

Travelled with the Second Doctor, then the Sixth

Seventh Doctor

• Thomas Hector "Hex" Scofield

Eighth Doctor

• Charlotte "Charley" Pollard

From her perspective, Charley traveled with the Eighth Doctor and then the Sixth Doctor.

• C'rizz
• Lucie Miller
• Mary Shelley
• Samson Griffin
• Gemma Griffin

Webcasts

Seventh Doctor

• Antimony

Disputed as companions

Some characters may or may not fit the definition of companion.

Television

First Doctor

• Sara Kingdom

Second Doctor

• Edward Travers

Second, Third and Fourth Doctors

• The Brigadier
• John Benton

Third Doctor

• Mike Yates

Eighth Doctor

• Grace Holloway
• Chang Lee

Ninth and Tenth Doctors

• Jackie Tyler
• Mickey Smith

Tenth Doctor

• Jenny
• River Song
• Astrid Peth
• Luke Smith
• Ianto Jones
• Gwen Cooper
• Jackson Lake
• Rosita
• Lady Christina de Souza
• Adelaide Brooke
• Wilfred Mott
• Cassie Rice
• Jimmy Stalkingwolf
• The Viewer
• Meta-Crisis Tenth Doctor
• K-9
• Sarah Jane Smith

Books

• Iris Wildthyme

List of recurring Doctor Who guest characters

Companions of non-canonical Doctors

Theatrical films

Dr. Who

• Susan
• Barbara
• Ian
• Louise
• Tom Campbell

Stage plays

Doctor Who and the Daleks in Seven Keys to Doomsday

Alternative Fourth Doctor

• Jenny
• Jimmy

Comics

the Doctor (AudioVisuals)

Party Animals

• Ria

Notes

Ria had originated in AudioVisuals, like "her" Doctor.

Television

The Curse of Fatal Death

• Emma
• The 17th Master

Webcasts

Scream of the Shalka

Alternative Ninth Doctor

• The Master
• Alison Cheney

Special cases

Theatrical plays

Doctor Who: The Ultimate Adventure

Various

• Jason
• Crystal
• Zog

Notes

The production of Doctor Who: The Ultimate Adventure starred the Third and later Sixth Doctors, plus one understudy playing a a non-canon Doctor.