The Second Doctor is an incarnation of the Doctor, the protagonist of
the BBC science fiction television series Doctor Who. He was portrayed
by actor Patrick Troughton.Within the series' narrative, the Doctor is
a centuries-old alien Time Lord from the planet Gallifrey who travels
in time and space in the TARDIS, frequently with companions. At the
end of life, the Doctor regenerates; as a result, the physical
appearance and personality of the Doctor changes. Troughton's Doctor
was an outwardly scruffy, light hearted and bumbling tramp nicknamed
the "Cosmic Hobo", who hid a more firm and slightly darker side he
would often use to manipulate his enemies and allies alike for the
greater good.The transformation into the Second Doctor (originally
referred to as a "renewal"), a figure who was the same 'essential'
character as the first but with a very different persona, was a
turning point in the evolution of the series, and eventually became a
critical element of the series' longevity. Second Doctor Biography, NetWorth, Height, Age, Weight, Family, Married, Son, Daughter