Jo Martin is a British actress. She played Natalie Crouch in the BBC
One sitcom The Crouches, which aired between 2003 and 2005. She joined
the cast of Holby City in 2019 and in a recurring role in sister
programme Casualty in August 2020, as CEO and neurosurgeon Max
McGerry. Martin portrayed an unknown incarnation of the Doctor in the
BBC TV series Doctor Who starting with the programme's twelfth
series.She was born in London to a Jamaican mother, who died in
2015.[citation needed]Martin first appeared in the series 12 episode
"Fugitive of the Judoon", playing Ruth Clayton, a tourist guide who is
later revealed to be an incarnation of the Doctor. She reprised her
role in the series finale, "The Timeless Children". Jo Martin Biography, NetWorth, Height, Age, Weight, Family, Married, Son, Daughter