1
Susan Foreman
Carole Ann Ford
First Doctor
2
Barbara Wright
Jacqueline Hill
First Doctor
3
Ian Chesterton
William Russell
First Doctor
4
Vicki
Maureen O'Brien
First Doctor
5
Steven Taylor
Peter Purves
First Doctor
6
Katarina
Adrienne Hill
First Doctor
7
Sara Kingdom*
Jean Marsh
First Doctor
8
Dodo Chaplet
Jackie Lane
First Doctor
9
Polly Wright
Anneke Wills
First Doctor, Second Doctor
10
Ben Jackson
Michael Craze
First Doctor, Second Doctor
11
Jamie McCrimmon
Frazer Hines
Second Doctor
12
Victoria Waterfield
Deborah Watling
Second Doctor
13
Zoe Heriot
Wendy Padbury
Second Doctor
14
Liz Shaw
Caroline John
Third Doctor
15
Jo Grant
Katy Manning
Third Doctor
16
Sarah Jane Smith
Eilsabeth Sladen
Third Doctor, Fourth Doctor, Tenth Doctor
17
Harry Sillivan
Ian Marter
Fourth Doctor
18
Leela
Louise Jameson
Fourth Doctor
19
K9
John Leeson / David Brierly
Fourth Doctor
20
Romana I
Mary Tamm
Fourth Doctor
21
Romana II
Lalla Ward
Fourth Doctor
22
Adric
Matthew Waterhouse
Fourth Doctor, Fifth Doctor
23
Nyssa
Sarah Sutton
Fourth Doctor, Fifth Doctor
24
Tegan Jovanka
Janet Fielding
Fourth Doctor, Fifth Doctor
25
Vislor Turlough
Mark Strickson
Fifth Doctor
26
Kamelion
Gerald Flood
Fifth Doctor
27
Peri Brown
Nicola Bryant
Fifth Doctor, Sixth Doctor
28
Mel Bush
Bonnie Langford
Sixth Doctor, Seventh Doctor
29
Ace
Sophie Aldred
Seventh Doctor
30
Grace Halloway*
Daphne Ashbrook
Eighth Doctor
31
Rose Tyler
Billie Piper
Ninth Doctor, Tenth Doctor
32
Adam Mitchell
Bruno Langley
Ninth Doctor
33
Jack Harkness
John Barrowman
Ninth Doctor, Tenth Doctor
34
Mickey Smith
Noah Clarke
Tenth Doctor
35
Donna Noble
Catherine Tate
Tenth Doctor
36
Martha Jones
Freema Agyeman
Tenth Doctor
37
Astrid Peth*
Kylie Minogue
Tenth Doctor
38
Jackson Lake*
David Morrissey
Tenth Doctor
39
Rosita Farisi*
Velile Tshabalala
Tenth Doctor
40
Lady Christine de Souza*
Michelle Ryan
Tenth Doctor
41
Adelaide Brooke*
Lindsay Duncan
Tenth Doctor
42
Wilfred Mott*
Bernard Cribbins
Tenth Doctor
43
Amy Pond
Karen Gillan
Eleventh Doctor
44
Rory Williams
Arthur Darvill
Eleventh Doctor
45
River Song
Alex Kingston
Eleventh Doctor, Twelfth Doctor
46
Craig Owens**
James Corden
Eleventh Doctor
47
Clara Oswald
Jenna Coleman
Eleventh Doctor, Twelfth Doctor
48
Nardole
Matt Lucas
Twelfth Doctor
49
Bill Potts
Pearle Mackie
Twelfth Doctor
* Only loosly considered a companion as they were only there for one story.
** Only loosly considered a companion as they were only there for two non-consecutive stories.