Sapphire & Steel

On an ordinary evening, a mother and father sing nursery rhymes to their daughter Helen before bed. Their teenage son Robert becomes alarmed when all the clocks in the house stop working. He hurries upstairs to find that his parents have vanished. Left alone with Helen and no neighbors nearby, Rob calls the police for help. But a pair of strange, time-traveling agents named Sapphire and Steel arrive instead and inform Rob that they are his only hope in getting his parents back.

Sapphire and Steel investigate the upstairs hallway after Rob sees a pair of ghostly soldiers on the landing. Unbeknownst to them, a living pool of light has escaped from Helens room and now lies in wait in a portrait at the top of the stairs. Sapphire walks right into the trap and disappears from the house. Only faintly able to communicate with Steel and Rob, Sapphire tells them she is stuck in a freezing cottage with the sensation that something sinister is there with her. Steel and Rob discover that Sapphire is trapped in the portrait and must work quickly to avoid losing her.

The time break strengthens after a nursery rhyme hidden in a book becomes stuck in Helens head. Sapphire burns the nursery rhyme book and Steel and Lead barely succeed in stopping the time break from spreading. The kitchen is left a windblown mess and Helen and Rob help Sapphire with the clean-up effort while Lead and Steel keep watch upstairs. Everything takes a turn for the worse when two more pools of light escape from the bedroom and Rob suddenly goes missing.

For their new assignment, Sapphire and Steel arrive at an abandoned railway station haunted by supernatural figures. Paranormal investigator George Tully has been observing the station for several weeks because he has an interest in speaking with the ghost of a young man often heard whistling in the hallways. Sapphire and Steel indulge Mr. Tully by allowing him to help their investigation but Steel warns him that the apparition is something far more dangerous than a ghost.

After Sapphire narrowly saves Steel from meeting the same fate as the doomed fighter pilot, Steel becomes determined to figure out why the ghosts are being recruited at the station. Since the ghosts have such strong emotions, Steel tries to anger the soldier into appearing by singing an old military marching song with Tully. Steels tactic works a little too well and the soldier takes out his anger on Sapphire and Tully.

With Sapphire as a medium, Tully and Steel are able to communicate with the ghost of a woman who was once the soldiers schoolteacher. As they prod the spirit with questions, she reveals that the force helping and controlling the ghosts is a terrible, living darkness. She also gives them the name of the soldier and the details of his untimely death. Satisfied with the information, Tully and Steel finish up the séance but an enveloping darkness creeps through the room and threatens to devour them all.

Sapphire and Steel awake to find they have been shunted forward in time twelve days. In that time, the darkness has gone and so have all the ghosts with it. A frightened Tully tries to convince Sapphire and Steel that he needs to leave the station for personal reasons, but they can guess he wants to leave because he made a deal with the darkness. While Tullys bargain failed, Sapphire reluctantly agrees to make contact with the darkness so that Steel can make his own deal with the enemy.

Sapphire and Steel receive a puzzling assignment at an apartment complex where time is poised to attack. However, their inspection of every room in the complex reveals nothing suspicious. Even the abandoned top floor reveals no indications of trouble. It is only after investigating the roof that Sapphire and Steel discover an invisible time-capsule from 1500 years in the future. A couple and their new baby are living inside the capsule as an experiment, but they are in grave danger because of a horrible figure hidden inside the capsule with them.

After Sapphire disappears while trying to contact the creature inside the capsule, Steel must figure out where she has gone and how to proceed with the investigation. Luckily, technology specialist Silver arrives to lend a hand with getting inside the capsule. Rothwyn and Eldred discover their child has gone missing and are at a loss for what to do next. Meanwhile, their adult-sized infant wanders the capsule under the control of the creature hidden inside the wall.

Sapphire and Steel subdue the changeling and find where the time source is hiding in the wall. Without their technician, however, they have no way to deconstruct the wall and defeat the creature hidden inside. Steels decision to resort to drastic measures pays off when the couple reappear in the capsule and the changeling becomes an infant again. But the creature inside the wall still thrives and presents a larger threat than anyone could have imagined.

Sapphire and Steel investigate strange happenings at a pawn shop. Children from the past are appearing, but how are these children connected to old photographs? What does the single tenant in the upstairs room know?

The missing shop owner and missing former roommate of the tenant are found in an unexpected place. Sapphire tries to contact the missing roommate. The faceless man intervenes.

A wealthy business man holds a party in a 1930s period reconstruction for his guests, but all is not what it seems. Sapphire and Steel invite themselves to investigate.

The party guests begin to realise that they are trapped, but their memories are beginning to fail and confusion is taking over. Then there is another death. But is there really?

Lord Arthur Mullrine organises a party to celebrate the fiftieth anniversary since his business partnership began with the late Dr George McDee.

A roadside garage in 1982 is seemingly stuck at 8:54pm, A car from 1948 appears with a man and a woman apparently waiting to return to 1948. Sapphire, Steel and Silver investigate, then time shifts forward to 9:04pm.

Who is the mysterious Johnny Jack from 1957 and what is his connection to the man from 1925 and the man from 1948? The woman from 1948 wants to talk to Sapphire, Steel and Silver. Silver reveals that they are trapped.