Who was the longest-serving Doctor?

The longest-serving actor to play the iconic character of the Doctor in the popular British TV series Doctor Who was Tom Baker. He portrayed the fourth incarnation of the Doctor for seven seasons, from 1974 to 1981. Baker's portrayal of the Doctor was known for his trademark long scarf, big personality, and quirky sense of humor. He remains a fan favorite to this day, and many consider him to be the quintessential Doctor.

Since then, the role has been played by a number of actors, each bringing their own unique take on the character. Some notable actors who have played the Doctor include David Tennant, Matt Smith, and Peter Capaldi, among others.

Doctor Who has been a cultural phenomenon since it first aired in 1963, and has remained popular through its many iterations and regenerations. The show has influenced numerous other works of science fiction and has become a beloved part of British pop culture. References to Doctor Who can be found in a wide range of media, from TV shows and movies to music and literature.

Tom Baker played the Fourth Doctor for seven years, from 1974 to 1981. He is the longest-serving actor to play the Doctor on television.

Baker's Doctor was known for his long scarf, his eccentric personality, and his love of adventure. He was a popular Doctor with fans, and his tenure is often considered to be one of the best eras of the show.