Created by Jack Gerson, The Omega Factor was first broadcast on TV in 10 parts in 1979 – and it very famously annoyed self-appointed watchdog Mary Whitehouse. Returning to audio via Big Finish in July 2015, the third series is out today.

3.1 Under Glass by Roy Gill

Adam is moving on with his life, but a new relationship tests him in unexpected ways. Anne's dealings with a gallery lead her to a macabre exhibit and its owner's even more macabre fate. Meanwhile, Morag tries desperately to send a warning...
Ambition has a price, and what is trapped will not stay trapped forever…

3.2 Let Us Play by Natasha Gerson

Anne is called by an old acquaintance at Glasgow University, concerned about student welfare. An online developer is employing young people to work on new apps, but their screen-time is having disturbing side-effects.
Soon, Adam is caught in a deadly and addictive game. One where the unwary player has much more to lose than a life…

3.3 Phantom Pregnancy by Louise Jameson

Doyle presents Anne with a psychic prodigy and takes a special interest in her progress. But Adhara is a vulnerable young woman, far from home, and Adam has concerns over Department 7's duty of care.
As Adhara's condition becomes apparent, Adam's health declines. Only Morag knows the true connection - can she reach out and save her friend?

3.4 Drawn to the Dark by Phil Mulryne

Something is buried under Edinburgh's streets. A dangerous legacy, centuries old. Anne tries to protect the innocents, while Morag and Adam sense a darkness, long-imprisoned, on the verge of release.
But they are not the only ones to feel it. Drexel has returned, and he plans to rise up more powerful than ever before...

Order The Omega Factor Series Three at £25 on CD or £20 on download. 

Also out today from the world of The Omega Factor is a novel set during the original series. Spider’s Web by Iain Mclaughlin tells a tale including Tom Crane, the original protagonist of The Omega Factor, played by the late James Hazeldine.

When a series of mysterious deaths confound the local press, Tom feels compelled to investigate – despite explicit instructions from his superiors at Department 7 to stay well away. Perhaps his instincts have been clouded by his growing feelings for his colleague, Anne Reynolds, or his dislike for their boss, Roy Martindale, but as events start to spiral out of control, Tom realises he has seriously underestimated the powers that he is dealing with...

Spider's Web is available on audiobook read by Louise Jameson on download at £9.99 or as a book at £16.99 or an ebook at £12.99. Or you can get them in an audiobook bundle with the Blake's 7 book Heroes and the Bernice Summerfield audiobook True Stories at £24.99.

If you’ve never heard The Omega Factor and the work of Department 7, try an extract of the very first episode, From Beyond by Matt Fitton, for free here.