Having children actors appear on Doctor Who is itself fraught with dangers as well, their presence somehow tainting any episode they’re cast in, like raisins in cookies, posting an actual photo of yourself on your Grindr account (that’s what a friend told me anyway), or Doctor Who on an American television network. It’s interesting to note that the classic series, although primarily just a children’s programme, mostly eschewed casting them but for small non-speaking roles, perhaps remembering W.C. Fields’ famous actor’s adage to “never work with children or animals;” the programme has a long history of well-placed real live animals, but children not so much.