Mickey Smith /ˈmɪkiˈsmɪθ/: Human. Married to Martha Jones. Travelled through time and space with the Doctor and Rose Tyler in a type-40 TARDIS. Lived several years in an alternate universe’s planet Earth, known as Pete’s World. Later came back to his original universe where he started working as a freelance alien-fighter with his wife, becoming a defender of two Earths.