Lost in Space is an American science fiction television series, created and produced by Irwin Allen, which originally aired between 1965 and 1968. The series was inspired by the 1812 novel The Swiss Family Robinson and a comic book published by Gold Key Comics titled Space Family Robinson. The series follows the adventures of the Robinsons, a pioneering family of space colonists who struggle to survive in the depths of space. The show ran for 83 episodes over three seasons; the first season (29 hour-long episodes) was filmed in black and white, and the 54 hour-long episodes of Seasons 2 and 3 were filmed in colour.

In Season 1, the Jupiter 2 lifts off on October 16, 1997, carrying a single family on a five and a half year journey to an Earth-like planet orbiting the star Alpha Centauri. The Robinsons: John, his wife Maureen, and their three children, Judy, Penny and Will, are accompanied by US Space Corps Major Donald West. Also joining them – by accident – is Dr Zachary Smith who has reprogrammed the Jupiter 2’s environmental control robot to destroy critical systems after launch. His extra weight throws the ship off course and the expedition becomes lost in the depths of outer space. They crash land on the planet Priplanus where they have to survive a host of adventures.

Season 2 sees the repaired Jupiter 2 escaping the destruction of Priplanus, following a series of earthquakes, but crash landing on another strange world. In Season 3, Jupiter 2 travelled freely through space attempting to return to Earth while encountering adventures along the way.

Source: Wikipedia

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Lost in Space was first broadcast in the UK on ITV between 1968 and 1970 and, for the most part, episodes were broadcast in the original US order. It would appear, however, that episodes one and two (“The Reluctant Stowaway” and “The Derelict”) were never broadcast on ITV, instead beginning with episode three, “Island in the Sky”. Broadcast of first-run episodes ceased with “The Mechanical Man” on May 18, 1970, and repeats from “Blast Off in Space” began.

The first repeat run on ITV ended on December 21, 1970, and then another run of repeats – from the third episode shown on British television, “The Hungry Sea” on January 4, 1971. “Welcome Stranger” was broadcast next, seemingly for the first time, before “My Friend, Mr Nobody” was repeated. The run, in broadcast order, continued until June 28, 1971, with “Follow the Leader”. The following two weeks, “The Phantom Family” and “The Mechanical Man” got their third showings but were then followed by first-time repeats from “The Astral Traveller” onwards.

On August 23, 1971, the episode “Hunter’s Moon” was broadcast for the first time. ITV’s repeat runs came to an end on January 10, 1972 with all episodes (except Season 1 episodes 1 & 2) broadcast at least once.

Source: The Television & Radio Database

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Episodes (original broadcast order)

Season 1

Island in the Sky
Broadcast August 19, 1968
Season 1, Episode 3 of Lost in Space.

There Were Giants in the Earth
Broadcast August 26, 1968
Season 1, Episode 4 of Lost in Space.

The Hungry Sea
Broadcast September 2, 1968
Season 1, Episode 5 of Lost in Space.

Season 1, episode 6: “Welcome Stranger” was not broadcast until January 11, 1971.

My Friend, Mr Nobody
Broadcast September 30, 1968
Season 1, Episode 7 of Lost in Space.

Invaders from the Fifth Dimension
Broadcast October 7, 1968
Season 1, Episode 8 of Lost in Space.

The Oasis
Broadcast October 17, 1968
Season 1, Episode 9 of Lost in Space.

The Sky is Falling
Broadcast October 24, 1968
Season 1, Episode 10 of Lost in Space.

Wish Upon a Star
Broadcast October 28, 1968
Season 1, Episode 11 of Lost in Space.

The Raft
Broadcast November 4, 1968
Season 1, Episode 12 of Lost in Space.

One of Our Dogs is Missing
Broadcast November 11, 1968
Season 1, Episode 13 of Lost in Space.

Attack of the Monster Plants
Broadcast January 10, 1969
Season 1, Episode 14 of Lost in Space.

Return from Outer Space
Broadcast January 17, 1969
Season 1, Episode 15 of Lost in Space.

The Keeper, Part One
Broadcast January 24, 1969
Season 1, Episode 16 of Lost in Space.

The Keeper, Part Two
Broadcast January 31, 1969
Season 1, Episode 17 of Lost in Space.

The Sky Pirate
Broadcast February 7, 1969
Season 1, Episode 18 of Lost in Space.

Ghost in Space
Broadcast February 14, 1969
Season 1, Episode 19 of Lost in Space.

The War of the Robots
Broadcast February 21, 1969
Season 1, Episode 20 of Lost in Space.

The Magic Mirror
Broadcast February 28, 1969
Season 1, Episode 21 of Lost in Space.

The Challenge
Broadcast March 7, 1969
Season 1, Episode 22 of Lost in Space.

The Space Trader
Broadcast March 14, 1969
Season 1, Episode 23 of Lost in Space.

His Majesty Smith
Broadcast March 21, 1969
Season 1, Episode 24 of Lost in Space.

The Space Croppers
Broadcast March 28, 1969
Season 1, Episode 25 of Lost in Space.

All That Glitters
Broadcast April 4, 1969
Season 1, Episode 26 of Lost in Space.

The Lost Civilisation
Broadcast April 18, 1969
Season 1, Episode 27 of Lost in Space.

A Change of Space
Broadcast April 18, 1969
Season 1, Episode 28 of Lost in Space.

Follow the Leader
Broadcast April 25, 1969
Season 1, Episode 29 of Lost in Space.

Season 2

Blast Off in Space
(Broadcast May 2, 1969)
Season 2, Episode 1 of Lost in Space. Also broadcast on June 1, 1970.

Wild Adventure
(Broadcast May 9, 1969)
Season 2, Episode 2 of Lost in Space. Also broadcast on June 15, 1970.

The Ghost Planet
(Broadcast May 16, 1969)
Season 2, Episode 3 of Lost in Space. Also broadcast on June 22, 1970.

Forbidden World
(Broadcast May 23, 1969)
Season 2, Episode 4 of Lost in Space. Also broadcast on June 29, 1970.

Space Circus
(Broadcast May 30, 1969)
Season 2, Episode 5 of Lost in Space. Also broadcast on July 6, 1970.

The Prisoners of Space
(Broadcast June 6, 1969)
Season 2, Episode 6 of Lost in Space. Also broadcast on July 13, 1970.

The Android Machine
(Broadcast June 13, 1969)
Season 2, Episode 7 of Lost in Space. Also broadcast on July 20, 1970.

The Deadly Games of Gamma 6
(Broadcast June 20, 1969)
Season 2, Episode 8 of Lost in Space. Also broadcast on July 27, 1970.

The Thief of Outer Space
(Broadcast June 27, 1969)
Season 2, Episode 9 of Lost in Space. Also broadcast on August 3, 1970.

Curse of Cousin Smith
(Broadcast July 4, 1969)
Season 2, Episode 10 of Lost in Space. Also broadcast on August 10, 1970.

West of Mars
(Broadcast July 11, 1969)
Season 2, Episode 11 of Lost in Space. Also broadcast on August 17, 1970.

A Visit to Hades
(Broadcast July 18, 1969)
Season 2, Episode 12 of Lost in Space. Also broadcast on August 24, 1970.

Wreck of the Robot
(Broadcast July 25, 1969)
Season 2, Episode 13 of Lost in Space. Also broadcast on September 7, 1970.

The Dream Monster
(Broadcast August 1, 1969)
Season 2, Episode 14 of Lost in Space.. Also broadcast on September 14, 1970.

The Golden Man
(Broadcast August 8, 1969)
Season 2, Episode 15 of Lost in Space. Also broadcast on September 21, 1970.

The Girl from the Green Dimension
(Broadcast August 15, 1969)
Season 2, Episode 16 of Lost in Space. Also broadcast on September 28, 1970.

The Questing Beast
(Broadcast August 22, 1969)
Season 2, Episode 17 of Lost in Space. Also broadcast on October 5, 1970.

The Toymaker
(Broadcast August 29, 1969)
Season 2, Episode 18 of Lost in Space. Also broadcast on October 12, 1970.

Mutiny in Space
(Broadcast September 5, 1969)
Season 2, Episode 19 of Lost in Space. Also broadcast on October 19, 1970.

The Space Vikings
(Broadcast September 12, 1969)
Season 2, Episode 20 of Lost in Space. Also broadcast on October 26, 1970.

Rocket to Earth
(Broadcast September 19, 1969)
Season 2, Episode 21 of Lost in Space. Also broadcast on November 2, 1970.

The Cave of the Wizards
(Broadcast September 26, 1969)
Season 2, Episode 22 of Lost in Space. Also broadcast on November 9, 1970.

Treasure of the Lost Planet
(Broadcast October 3, 1969)
Season 2, Episode 23 of Lost in Space. Also broadcast on November 16, 1970.

Revolt of the Androids
(Broadcast October 10, 1969)
Season 2, Episode 24 of Lost in Space. Also broadcast on November 23, 1970.

The Colonists
(Broadcast October 17, 1969)
Season 2, episode 25 of Lost in Space. Also broadcast on November 30, 1970.

Trip Through the Robot
(Broadcast October 24, 1969)
Season 2, Episode 26 of Lost in Space. Also broadcast on December 7, 1970.

The Phantom Family
(Broadcast October 31, 1969)
Season 2, Episode 27 of Lost in Space. Also broadcast on December 14, 1970, and July 5, 1971.

The Mechanical Men
(Broadcast November 7, 1969)
Season 2, Episode 28 of Lost in Space. Also broadcast on December 21, 1970, and July 12, 1971.

The Astral Traveller
(Broadcast November 28, 1969)
Season 2, Episode 29 of Lost in Space. Also broadcast on July 19, 1971.

The Galaxy Gift
(Broadcast December 5, 1969)
Season 2, Episode 30 of Lost in Space. Also broadcast on July 26, 1971.

Season 3

Condemned of Space
(Broadcast December 12, 1969)
Season 3, Episode 1 of Lost in Space. Also broadcast on August 2, 1971.

Visit to a Hostile Planet
(Broadcast December 19, 1969)
Season 3, Episode 2 of Lost in Space. Also broadcast on August 9, 1971.

Kidnapped in Space
(Broadcast December 24, 1969)
Season 3, Episode 3 of Lost in Space. Also broadcast on August 16, 1971.

Season 3, episode 4: “Hunter’s Moon” was not broadcast until August 23, 1971.

The Space Primevals
(Broadcast January 2, 1970)
Season 3, Episode 5 of Lost in Space. Also broadcast on August 30, 1971.

Space Destructors
(Broadcast January 9, 1970)
Season 3, Episode 6 of Lost in Space. Also broadcast on September 6, 1971.

The Haunted Lighthouse
(Broadcast January 12, 1970)
The 18th episode of Men Into Space. Also broadcast on September 13, 1971.

Flight into the Future
(Broadcast January 19, 1970)
The 18th episode of Men Into Space. Also broadcast on September 20, 1971.

Collision of the Planets
(Broadcast January 26, 1970)
The 18th episode of Men Into Space. Also broadcast on September 27, 1971.

The Space Creatures
(Broadcast February 2, 1970)
The 18th episode of Men Into Space. Also broadcast on October 4, 1971.

Deadliest of the Species
(Broadcast February 9, 1970)
The 18th episode of Men Into Space. Also broadcast on October 11, 1971.

A Day at the Zoo
(Broadcast February 16, 1970)
The 18th episode of Men Into Space. Also broadcast on October 18, 1971.

Two Weeks in Space
(Broadcast February 23, 1970)
The 18th episode of Men Into Space. Also broadcast on October 25, 1971.

Castles in Space
(Broadcast March 9, 1970)
The 18th episode of Men Into Space. Also broadcast on November 1, 1971.

The Anti-Matter Man
(Broadcast March 16, 1970)
The 18th episode of Men Into Space. Also broadcast on November 8, 1971.

Target: Earth
(Broadcast March 23, 1970)
The 18th episode of Men Into Space. Also broadcast on November 15, 1971.

Princess of Space
(Broadcast March 30, 1970)
The 18th episode of Men Into Space. Also broadcast on November 22, 1971.

Time Merchant
(Broadcast April 6, 1970)
The 18th episode of Men Into Space. Also broadcast on November 29, 1971.

The Promised Planet
(Broadcast April 13, 1970)
The 18th episode of Men Into Space. Also broadcast on December 6, 1971.

Fugitives in Space
(Broadcast April 20, 1970)
The 18th episode of Men Into Space. Also broadcast on December 13, 1971.

Space Beauty
(Broadcast April 27, 1970)
The 18th episode of Men Into Space. Also broadcast on December 20, 1971.

The Flaming Planet
(Broadcast May 4, 1970)
The 18th episode of Men Into Space. Also broadcast on December 27, 1971.

The Great Vegetable Rebellion
(Broadcast May 11, 1970)
The 18th episode of Men Into Space. Also broadcast on January 3, 1972.

The Junk Yard of Space
(Broadcast May 18, 1970)
The 18th episode of Men Into Space. Also broadcast on on January 10, 1972.

Welcome Stranger
(Broadcast January 11, 1971)
Season 1, Episode 6 of Lost in Space. This episode should have followed “The Hungry Sea” in broadcast order in 1968.

Hunter’s Moon
(Broadcast August 23, 1971)
Season 3, Episode 1 of Lost in Space. This episode should have followed “Kidnapped in Space” in broadcast order in 1970.