I've been thinking about this a lot, especially after watching "The Waters of Mars." Defining the criteria for Doctor Who companion has always been a tricky matter, but I think it has become even harder with the new series specials (starting with "The Runaway Bride") and extended families (Mickey and Jackie in particular). Before, there had been question about the companion status of such characters as Katarina (appeared in only two serials), Sara Kingdom (who only appeared in one serial, but traveled through time and space with The Doctor and Steven for nine episodes), the UNIT characters (Liz, The Brig, Benton, and Yates), Kamelion (because of his infrequent appearances and being controlled by The Master), and Grace.
Is it a matter of number of appearances or lengh of duration? Is it a matter of whether they traveled in the TARDIS? Is it a matter of receiving an invitation from The Doctor (whether or not they accepted it)? Is it a matter of how close they come with The Doctor and/or the current companion(s)?
I've noticed that Jackson Lake, Rosita, Lady Christina de Souza, and Adelaide Brooke are all being considered companions by fans and listed as such on the BBC website. However, I would argue all of them except maybe Lady Christina de Souza (her role being similar to Grace, Donna in "The Runaway Bride," and Astrid) are not companions. Jackson Lake stands on his own and only reallly takes a back seat towards the end of "The Next Doctor" but I can't really see him as a companion, and with that said, Rosita is a companion only to Jackson. I have even further problems with calling Adelaide Brooke a companion because she's a leader of a group of people and only works alongside The Doctor for the sake of her crew. If we're to call her a companion, then suddenly countless other characters over the years should be counted as companions during their one-off appearance.
Additionally, I've sometimes noticed that Adam isn't counted or overlooked as a companion despite being in two episodes and traveled through time and space with The Doctor and companion. If one don't counts him, then one can't count Katarina or Sara Kingdom, and certainly not any of the recent one-off companions in the specials.
So what say you? How do you define "companion"?
Is it a matter of number of appearances or lengh of duration? Is it a matter of whether they traveled in the TARDIS? Is it a matter of receiving an invitation from The Doctor (whether or not they accepted it)? Is it a matter of how close they come with The Doctor and/or the current companion(s)?
I've noticed that Jackson Lake, Rosita, Lady Christina de Souza, and Adelaide Brooke are all being considered companions by fans and listed as such on the BBC website. However, I would argue all of them except maybe Lady Christina de Souza (her role being similar to Grace, Donna in "The Runaway Bride," and Astrid) are not companions. Jackson Lake stands on his own and only reallly takes a back seat towards the end of "The Next Doctor" but I can't really see him as a companion, and with that said, Rosita is a companion only to Jackson. I have even further problems with calling Adelaide Brooke a companion because she's a leader of a group of people and only works alongside The Doctor for the sake of her crew. If we're to call her a companion, then suddenly countless other characters over the years should be counted as companions during their one-off appearance.
Additionally, I've sometimes noticed that Adam isn't counted or overlooked as a companion despite being in two episodes and traveled through time and space with The Doctor and companion. If one don't counts him, then one can't count Katarina or Sara Kingdom, and certainly not any of the recent one-off companions in the specials.
So what say you? How do you define "companion"?