10 free Doctor Who: Companions trivia questions with answers — trivia quiz, new questions added Aug 2026.
The Doctor's companions are often as beloved as the Time Lord himself—some traveled the stars for seasons, others for just one adventure. See how well you remember the people who shaped the Doctor's journey across time and space.
All 10 questions with answers and explanations. Play the quiz
Q 01Who was the First Doctor's granddaughter and initial companion?
Susan Foreman
Susan Foreman was the very first companion of the Doctor, introduced in the show's inaugural episode. She was established as the Doctor's granddaughter.
Q 02Which companion traveled with the Ninth and Tenth Doctors?
Rose Tyler
Rose Tyler was the first companion of the revived series, traveling extensively with the Ninth Doctor and then continuing her adventures with the Tenth Doctor.
Q 03Who was a medical student and companion to the Tenth Doctor?
Martha Jones
Martha Jones was a junior doctor in training when she first encountered the Tenth Doctor at the Royal Hope Hospital, becoming his companion.
Q 04Which companion briefly became a 'Human-Time Lord Metacrisis'?
Donna Noble
Donna Noble absorbed the Doctor's regeneration energy and intellect, creating the Human-Time Lord Metacrisis, which ultimately threatened her life.
Q 05Who was the Eleventh Doctor's first companion?
Amy Pond
Amy Pond was the first companion to travel with the Eleventh Doctor, having known him since childhood. She was often accompanied by her husband, Rory Williams.
Q 06Which companion was known as 'The Impossible Girl'?
Clara Oswald
Clara Oswald earned the title 'The Impossible Girl' because she kept appearing throughout the Doctor's timeline in various guises, seemingly dying and reappearing.
Q 07Who was a former companion of the Third and Fourth Doctors, later returning in the new series?
Sarah Jane Smith
Sarah Jane Smith was a beloved companion to the Third and Fourth Doctors, gaining such popularity that she returned in the revived series and starred in her own spin-off, The Sarah Jane Adventures.
Q 08Which companion and Time Agent was often described as a 'fixed point in time'?
Jack Harkness
Captain Jack Harkness, an immortal former Time Agent, became a recurring companion and was described by the Doctor as a 'fixed point in time'.
Q 09Who was a companion of the Seventh Doctor and often carried a baseball bat?
Ace
Ace was a rebellious teenager from Perivale who traveled with the Seventh Doctor and was known for her explosive Nitro-9 and her trusty baseball bat.
Q 10Which companion was a robot dog?
K9
K9, a highly intelligent robotic dog, served as a companion to the Fourth Doctor and later to Sarah Jane Smith, appearing in multiple iterations.