The term "Doctor Who season 1" can refer to two different first seasons of the British science fiction television series "Doctor Who," depending on whether you mean the original classic series or the revived modern series.

Classic Doctor Who Season 1 (1963–1964)

• The original first season aired on BBC TV from November 23, 1963, to September 12, 1964.
• It introduced William Hartnell as the First Doctor, an alien time traveler.
• His companions included his granddaughter Susan Foreman and schoolteachers Ian Chesterton and Barbara Wright.
• The stories ranged from historical adventures (like the Aztec civilization and the French Revolution) to futuristic tales, including the introduction of the Daleks.
• The season was created to appeal to both young and older audiences and was produced by Verity Lambert with story editor David Whitaker

Modern Doctor Who Series 1 (2005)

• The first series of the revived show began on March 26, 2005, and ended on June 18, 2005.
• It starred Christopher Eccleston as the Ninth Doctor, accompanied mainly by Billie Piper as Rose Tyler.
• The series had 13 episodes and was developed by Russell T Davies, who revived the show after a 16-year absence.
• The Doctor travels in the TARDIS, a time machine disguised as a 1950s British police box, exploring time and space and facing various foes.
• The series included story arcs such as the recurring phrase "Bad Wolf" and introduced key characters like Captain Jack Harkness.
• Notable episodes include encounters with the Daleks, the Slitheen, and the space station Platform One storyline

In summary, "Doctor Who season 1" could mean either the original 1963-64 season with William Hartnell or the 2005 revived first series with Christopher Eccleston, depending on the context.