This clip comes from the era of the Second Doctor, as played by Patrick Troughton. While the First Doctor (William Hartnell) was irascible, irritable and implacable, Troughton played his Doctor as a cosmic hobo; a warm but brilliant wanderer with a mischievous twinkle and a penchant for playing the fool and allowing his enemies to underestimate him. Matt Smith has said that when he was cast as the Eleventh Doctor, it wasn't until watching Troughton that he really got a handle on how to play the character. A consummate character actor, Troughton's performance is most often quoted as an inspiration to his successors in the role, and his success in taking over the role undoubtedly secured the show's longevity to this day.
In this quiet scene from the 1967 classic The Tomb of the Cybermen, the Doctor comforts his new travelling companion, Victoria.
See you soon for more classic Who!