SHADO engages in its first battle with the enemy. Sky One cripples an alien ship which crash-lands in a lake. Straker's team capture its pilot, a strange blue-skinned humanoid - and the grim secrets b…

An XV-104 test plane wanders into a UFO target area and the pilot, Paul Foster, makes sightings of both the UFO and Sky One. Angry and frustrated that no one believes his story, Foster suspects a cove…

The body of an Alien, recovered after a UFO attack on Moonbase, reveals some startling new evidence which overturns all SHADO's previous theories about the Aliens. For Interceptor pilot Jim Regan, the…

When an Alien Limpet UFO causes the destruction of Lunar Module 32, Straker demands a clean-up programme by the International Astrophysical Commission to remove hazardous space debris from Earth orbit…

"Important? What can be more important than your own son's life?" Straker faces the toughest decision of his career when his son is critically injured in an accident. The drug that can save his life …

John Croxley's talent for extra sensory perception is heightened after his wife is killed when a UFO crashes into their house. With his mind under the influence of the Aliens, Croxley learns the secre…

When a Lunar Module is attacked by a UFO, Straker makes a split-second decision that endangers the astronauts, but ultimately saves them. Later, he is surprised to find his authority being questioned …

Suspecting a UFO to be responsible for the sinking of a freighter, Straker, Foster and Nina Barry investigate in Skydiver. Attacked by an undersea UFO, the submarine is downed on a ledge on the sea be…

A Naval vessel shoots down a UFO in the Atlantic, but the Admiralty rejects further investigation into the incident. Straker suspects a cover up and wants to know why, so Foster courts Admiral Shering…

"Unfortunately for them, an Alien came through that door instead of her husband." In the woods between Clare Cross and Lingbury, an injured Alien stumbles into a lonely cottage and is shot down by Li…

Straker gets approval from above to build a probe with a camera that will track a UFO back to its home planet. Inexplicably, the Earth technology is capable of following a UFO travelling 8 or 9 times…

A UFO imbues three young people with incredible powers. One blows up a radar station, a second steals fingerprints and tries to get aboard a Skydiver sub, blowing it up. The third, a woman, tries to…

Foster, whose radio is knocked out and his oxygen line cut, is presumed lost (but they did a crummy job, not even trying to find his body) during a confrontation with a UFO on the moon's surface. Fos…

After a UFO inexplicably destroys itself less than two miles from Moonbase, a mysterious crystal rock is recovered, and it causes the person in its vicinity to hallucinate. The man on Moonbase who fo…

A SHADO Technician, who is being blackmailed for information by an unknown party, is caught by Freeman, but not before the information is passed. The Technician, Paul Roper, divulges what information…

Reported missing, presumed dead, after a UFO incident which has left SID disabled, astronaut Craig Collins turns up alive and well. But as an operation to complete repair work on SID is planned, Colon…

Two of the SHADO people, dining at a fancy restaurant, begin to recall this event after one of them sees a diner who was part of Dalotek. A private company installed a facility on the moon which dis…

While picking up Lt. Lake at the airport, Straker and Lake find that time has been frozen except for them. Sawdust hangs in mid-air, Lt. Ellis is frozen mid-word on a viewscreen, and one man is ta…

Foster is abducted by aliens from a health spa and is being taken out into space, presumably back to the alien homeworld. However, the UFO was damaged and returns to the moon, crashing there. While …

Foster is suspected of being a security leak, but during the trial, Straker and his colleagues discover that Foster's apartment was bugged and shut down the disreputable business that is selling the s…

A SHADO investigation reveals that romance may be complicating Moonbase operations.

A flashback episode in which Straker recalls his marriage, followed by stormy days as he must work covertly to get SHADO up and running and recruit personnel. All this leaves his wife angry at his abs…

A UFO hides in a lake on a country estate of a well-known equestrian, and the equestrian himself vanishes. When SHADO tracks down the UFO and manages to destroy it in an exchange of pot-shots, the UFO…

A mysterious dome is found under the sea, that at first looks like the Moon crashed into the ocean. Inside the dome, they find duplicates of SHADO HQ personnel, using non-alien technology - cassette …

Freeman takes over temporarily while Straker deals with a woman apparently determined to investigate what SHADO is all about.

A woman awakens from a 10-year coma and begins telling the tale about her encounter with aliens, along with her boyfriend, while they were high on drugs. They toyed with the aliens, and the man appare…