Stephanie Hyam
From Tardis Wiki, the free Doctor Who reference
Stephanie Hyam played Heather, and the sentient oil taking Heather's form, in the Doctor Who television story The Pilot.
Outside of Doctor Who, Hyam played Charlotte Murray in Peaky Blinders and Lily Clarke/Carew in Jekyll and Hyde.
Additionally, in Steven Moffat and Mark Gatiss' Sherlock, Stephanie Hyam was John Watson's maid, Jane, in the Christmas special The Abominable Bride.
