In a sleepy English village surrounded by a megalithic stone circle, an astrophysicist and his teenage son arrive to research the standing stones, but end up delving into the past in ways they never expected.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Into the Circle | 1977-01-10 | 30 min |
| Season 1 | Episode 2 | Circle of Fear | 1977-01-17 | 30 min |
| Season 1 | Episode 3 | Serpent in the Circle | 1977-01-24 | 30 min |
| Season 1 | Episode 4 | Narrowing Circle | 1977-01-31 | 30 min |
| Season 1 | Episode 5 | Charmed Circle | 1977-02-07 | 30 min |
| Season 1 | Episode 6 | Squaring the Circle | 1977-02-14 | 30 min |
| Season 1 | Episode 7 | Full Circle | 1977-02-21 | 30 min |
| Production | Patrick Dromgoole | Producer |
| Sound | Sidney Sager | Music |
| Writing | Trevor Ray | Writer |
| Writing | Jeremy Burnham | Writer |
| Art | Kenneth Jones | Production Design |
| Production | Peter Graham Scott | Producer |
| Editing | Adrian Brenard | Editor |
| Sound | John Cross | Sound |
| Sound | Mike Davey | Sound |
| Camera | Roger Pearce | Camera Operator |
