Due to popular demand, here's a guide to my recent pic.
A few things I should mention:
-People griping about this omission or that are kinda missing the point of the title "infinite". This is just a sliver of the various forms of the Doctor out there. It's more a celebration of what he (or she) could be (at least so far) than any individual fan's idea of what the Doctor "is".
-For the sake of my own sanity, I downplayed spoof versions except for the most famous ones, and mostly stayed away from fan creations (like the "Devious" Doctor), alternate timeline versions ("Jubilee", "Blood Heat", etc), clones ("Project: Lazarus", "Survivors in Space"), androids ("The Android Invasion", "The Chase", "The Wedding of River Song"), dopplegangers ("The Enemy of the World", "The Massacre"), just-gangers ("The Rebel Flesh"), false Doctors ("The Next Doctor"), impostors ("The One Doctor"), disguises (Mr. Popplewick from "The Ultimate Foe"), brain-swaps (Amy Pond in IDW Comics) and "analogue" versions (Dr. Whooves, Inspector Spacetime, Professor Gamble, the Stranger, the Foot Doctor, etc, etc...).
So with that in mind, here's what did make it in...
1) Richard Griffiths- series producer John Nathan-Turner's hypothetical choice for the 8th Doctor, as illustrated by the late Phil Bevan in Doctor Who Magazine #255.
2) The imposing and mysterious version of the First Doctor from Japanese publisher Hayakawa Bunko's translated edition of the book "Doctor Who in an Exciting Adventure with the Daleks", as depicted in numerous illustrations by Michiaki Sato: www.personal.leeds.ac.uk/~ecl6…
Not pictured here is another Hayakawa Doctor who appeared in four translations of the Third Doctor's adventures. His look was more similar to his respective Doctor (though, interestingly, he sometimes wore a Holmesian deerstalker cap).
3) David Banks, a.k.a. "The Greenpeace Doctor" (named for his t-shirt). The former Cyberleader was Jon Pertwee's co-star and understudy in the stage play "The Ultimate Adventure" and had to fill in for a few performances when Pertwee fell ill. images.wikia.com/tardis/images…
4) Graeme Harper (future director of many Classic and New Series episodes) as one of the faces glimpsed during the mind-bending battle from "The Brain of Morbius": youtu.be/7y8uNMPJfwQ
Though they were pretty much retconned down the road, these were almost certainly intended as previously-unknown past lives of the Doctor. Fans generally deride the idea of these Doctors now, as the notion of pulling some secret past incarnation out of nowhere is a very dirty trick and should never, ever happen again.
5) Arabella Weir as the alternative Doctor from "Exile", part of the Big Finish audio series "Doctor Who: Unbound". Made to celebrate the 40th Anniversary of the show, each play dealt with a different "What if" scenario. All are available from Big Finish (at pretty reasonable prices) here: bigfinish.com/ranges/released/…
6) "Unbound" Doctor Ian Brooker, who appears very, very briefly at the end of the story "Full Fathom Five".
7) Most of the obscured Doctors in the picture shouldn't be read into too much, but that's Paul McGann's chin, so if it makes you feel better, you can believe that this is the McGann-ish Doctor from Lance Parkin's novel "The Infinity Doctors": en.wikipedia.org/wiki/The_Infi…
8) Alternative 4th Doctor Trevor Martin, from the stage play "Doctor Who and the Seven Keys to Doomsday": en.wikipedia.org/wiki/Seven_Ke…
9) The Other- a mysterious and complicated figure from the Doctor's past. Vaguely hinted at in the 7th Doctor's TV stories, the idea was expanded on in the novelization of "Remembrance of the Daleks" and several of the 90s novels released by Virgin Publishing. tardis.wikia.com/wiki/The_Othe…
10) "Morbius Doctor" (and legendary show author/ script editor) Robert Holmes. Smoking a pipe, of course.
11) The 42nd Doctor (based on actor Ian Richardson), who appeared in "Valeyard of the Daleks" a scrapped epilogue from Lance Parkin's novel "The Dying Days": lanceparkin.wordpress.com/2013…
It depicted a well-adjusted and married Doctor enjoying semi-retirement. It was probably cut because meeting a far-off future retired Doctor, and especially a married Doctor, would never, ever happen in the actual TV series.
12) The Watcher- a peculiar manifestation of the Doctor encountered in the 4th Doctor's final story, "Logopolis"
13) Derek Jacobi as the troubled and semi-delusional author from the "Doctor Who: Unbound" story "Deadline".
14) "Morbius Battle Doctor" George Gallacio.
15) Jon Culshaw's famous send-up of the 4th Doctor from various episodes of the radio & TV series "Dead Ringers": youtu.be/Q88kt_Vtyl4
Culshaw eventually voiced the 4th Doctor somewhat more canonically in the audio play "The Kingmaker": bigfinish.com/releases/v/the-k…
16) My own fan-fabrication, the 12th Doctor as played by actress by actress Ruth WIlson: fav.me/d67rw8g
(Hey, you got a problem with it, go draw your own picture.)
17) Revered show producer Philip Hinchcliffe as one of the Morbius Battle Doctors.
18) Show director Christopher Barry (R.I.P.) as one of the Morbius Doctors.
19) "Unbound" Doctor Geoffrey Bayldon- an alternative First Doctor from the stories "Auld Mortality" and "A Storm of Angels".
20) Richard Hurndall as the First Doctor ("The Five Doctors").
21) Again, the obscured faces shouldn't be read into too much- but that's the chin of alternative "Doctor" Alex McQueen, from the excellent audio series "UNIT: Dominion": bigfinish.com/releases/v/docto…
22) Barbara Benedetti as the alternative 7th Doctor from various fan-films made by Seattle International Films from 1984-1988: youtu.be/23Y53bgZyhE
23) Muldwych, an elderly Time Lord hermit from the 90s novels "Birthright" and "Happy Endings". Heavily implied to be the Doctor from a far-off future.
24) "Morbius Doctor" Chris Baker.
25) The Valeyard (Michael Jayston), the Doctor's evil future incarnation first encountered in "The Trial of a Time Lord" (and later numerous books, audio plays, etc): youtu.be/Y2INBe_qZFo
Fans frequently misattribute him as being a Watcher-like "half" incarnation that had to occur between the 12th and 13th lives, due to the Master's statement that he originates from a point somewhere between the Doctor's "12th and final incarnation". Given recent developments in the Doctor's life, that makes the Valeyard's exact nature (and estimated time of arrival) more nebulous than ever. But his recent name-drop by the Great Intelligence at Trenzalore indicates he's still very much on the way...
26) The first of the two Doctors portrayed in various trading cards produced by Cadet Sweets in 1964 (making this the great-granddaddy of all alternative Doctors): www.scififx.com/2012/09/doctor…
27) The Dream Lord, from "Amy's Choice"- a hallucinatory manifestation of the Eleventh Doctor's dark side.
28) The Curator of the Undergallery ("The Day of the Doctor"). An enigmatic figure who resembled the 4th Doctor and might possibly be a retired Doctor from the very distant future wearing an "old favorite" face.
29) The pragmatic and callous (and gun-toting!) "Unbound" Doctor from "Full Fathom Five", as played by David Collings.
30) Nicholas Briggs, the Lon Chaney of Alternative Doctors, here as the "Nth" version from various Audio Visuals fan productions and the Doctor Who Magazine comic strip "Party Animals", where he appeared to be a far future Doctor. The latter appearance may or may not have been the Gallifreyan agent Shayde, who adopted an identical disguise later during the 8th Doctor's comic strip tenure. Briggs also played other alternative Doctors in "Doctor Who Unbound", various stage plays, the audio version of "Seven Keys to Doomsday" and, sort of, in the 8th Doctor audio "Minuet in Hell". He's also the current official voice of the Daleks, Cybermen, Judoon, and Ice Warriors- so maybe it's more accurate to say he's Doctor Who's equivalent of Mel Blanc.
31) Jim Broadbent as one of the Doctors from the epic 1999 Comic Relief sketch "The Curse of Fatal Death", penned by a young Steven Moffat: youtu.be/Do-wDPoC6GM
32) "Morbius Doctor" (and legendary series director) Douglas Camfield. He looks like he would've been a fun Doctor, doesn't he?
33) The Ninth Doctor, Christopher Eccleston.
34) The great David Warner as the "Unbound" Third Doctor from "Sympathy for the Devil" and "Masters of War". He's also encountered ("off-camera") by the 6th Doctor in the audio story "100", which implies that the Unbound Doctors all exist in alternative universes running parallel to the show's "real" one.
35) The second "Cadet Sweets" Doctor.
36) The Doctor from a proposed 1980s cartoon by animation studio Nelvana. The idea never developed past some (really interesting) concept art: megomuseum.com/community/showt…
37) "Fatal Death" Doctor Richard E. Grant, who would play another version of the Doctor 4 years later (see #52).
38) Lenny Henry as the Doctor from this 1985 sketch that charmingly sent up mid-80s Doctor Who (as well as Thatcher-era politics): youtu.be/EdfwXiVyE8I
39) The Sixth Doctor, Colin Baker- here wearing his costume from the stage play "The Ultimate Adventure".
40) The Third Doctor, Jon Pertwee.
41) The Fourth Doctor, Tom Baker.
42) The Second Doctor, Patrick Troughton.
43) The Tenth Doctor, David Tennant.
44) Donna Noble (Catherine Tate), transformed into "The DoctorDonna" as the result of an accidental human/ Time Lord "metacrisis" ("Journey's End").
45) The other half of the "Metacrisis"- a human copy of the Tenth Doctor grown from his severed hand.
46) The Eleventh Doctor, Matt Smith.
47) The Fifth Doctor, Peter Davison.
48) The Seventh Doctor, Sylvester McCoy- dressed in his costume from the 90s "New Adventures" novels.
49) The Doctor (Mark Gatiss) from the 1999 Doctor Who Night sketch "The Web of Caves": youtu.be/xETlYacSCHE
50) Dr. Who (Peter Cushing) the human inventor of T.A.R.D.I.S.. He appeared in the two 1960s Dalek films, as well as a long-lost radio show pilot: youtu.be/hkC2JgC9CR4
51) "Fatal Death" Doctor Hugh Grant. "Result!"
52) The briefly-canonical original Ninth Doctor (Richard E. Grant, again) from the 2003 BBC webcast "The Scream of the Shalka". Further adventures were planned, but scrapped when the BBC decided to bring the show back to television. It's still available free (and legal) here: www.bbc.co.uk/doctorwho/classi…
53) The First Doctor, William Hartnell.
54) The Eighth Doctor, Paul McGann.
55) "Fatal Death" Doctor Joanna Lumley.
56) The Doctor's nameless past incarnation who fought in the Time war, played by John Hurt (in "The Name of the Doctor", "The Night of the Doctor", and "The Day of the Doctor"). Generally known for branding purposes as "The War Doctor" or "Other Doctor".
57) "Fatal Death" Doctor Rowan Atkinson.
58) The Twelfth Doctor, Peter Capaldi.
59) "Morbius Doctor" (and series writer) Robert Banks Stewart .