Frazer Simpson Frederick Hines (born 22 September 1944) is an English actor. He began his career as a child actor and appeared in A King in New York (1957) with Charlie Chaplin. He later played Jamie McCrimmon in Doctor Who, appearing in more episodes than any other companion. He was a regular in the series alongside Patrick Troughton as the Second Doctor between 1966 and 1969, and made guest appearances in The Five Doctors (1983) and The Two Doctors (1985). He also played Joe Sugden in Emmerdale Farm between 1972 and 1994.

Hines was born in Horsforth, a north-west suburb of Leeds in the West Riding of Yorkshire, the third son of Bill and Molly Hines. His mother was Scottish and came from Port Glasgow. Shortly after Hines was born, the family moved to Harrogate where his mother ran a boarding house. As a child, Hines went to the Western Board Primary School and then Norwood College. Through his parents attending a local amateur dramatics group and regularly visiting the cinema, Hines discovered a love for performing and began attending the Margery Newbury School of Dancing every Saturday morning. It was here that during a performance aged seven at the Royal Hall in Harrogate that Hines sang the song Louise while doing an impersonation of Maurice Chevalier which generated newspaper headlines reading "A young star is born here tonight at the Royal Hall Harrogate".

Because of this success, Hines began attending Corona Theatre School in London where his classmates included Richard O'Sullivan, Dennis Waterman, Jeremy Bulloch and Francesca Annis.

Hines made his debut in the film John and Julie (1955) as an extra in a crowd scene, Hines went on to have minor roles in Moby Dick, The Weapon and X the Unknown (all 1956). Hines' breakthrough role was in 1957 where he performed the role of Napoleon in a six-part television adaptation of John Buchan's 1922 novel Huntingtower. That same year, Hines appeared alongside Charlie Chaplin in the film A King in New York. From 1957 and throughout the 1960s, he performed a steady stream of roles in various television series, such as Jan in The Silver Sword (1957–58), Tim Birch in Emergency Ward 10 (1963–64), and Roger Wain in Coronation Street (1965). He appeared in a 1964 serial, Smuggler's Bay, with Patrick Troughton.

With a well-established career in television, Hines acted in feature films less frequently, but appeared in I Could Go On Singing (1963) with Judy Garland and he provided an uncredited voice for the James Bond film You Only Live Twice (1967).

Hines auditioned for the part of Ben Jackson in Doctor Who in 1966 but was unsuccessful. His debut came in the same year, when he was cast to play the part of Jamie McCrimmon, the companion of the Second Doctor (played by Patrick Troughton). Originally intended as a one-off guest character, Jamie joined the regular cast and appeared in the series from 1966 to 1969.

Hines reprised the role in a cameo in the 20th anniversary serial "The Five Doctors" (1983) and as a guest star in The Two Doctors (1985). Hines appeared in more episodes than any other "companion" actor in the history of the series, but many of the episodes featuring Jamie no longer exist in the BBC's collection. The only actors to have more credited appearances are the First to the Fourth Doctor.

In 1968, during his third year on the show, Hines released with Major Minor Records the novelty record "Who's Dr. Who?" Esteemed songwriters Barry Mason and Les Reed composed the music and lyrics, but the record was a commercial failure. Hines later called it the only flop Mason and Reed ever wrote.