These days it's not always enough for Doctor Who companions to be ordinary people he meets on his travels. From Amy Pond and Clara Oswald through to the most recent TARDIS resident, Ruby Sunday, there's a trend for characters with backstories as strange and complex as the alien worlds the Doctor explores.
New companion Belinda Chandra (Varada Sethu) is no exception. Although her priority is getting back home so she can start a new nursing shift on Monday, she soon discovers that a whole planet shares her name, and that she has a doppelganger — called Mundy Flynn — fighting a war somewhere in the 51st century.
