The trailer for The Diary of River Song: Series Five is here. Place your bets on the survival of the universe now…

Four masterly encounters await River in series five…

The Bekdel Test by Jonathan Morris sees the Doctor’s wife meet the Doctor’s ‘girlfriend’. Animal Instinct by Roy Gill has River meeting the decayed Master, played by Geoffrey Beevers. The Lifeboat and the Deathboat by Eddie Robson brings the return of the Master played by Eric Roberts – will we find out what happened after the Doctor Who TV movie? And Concealed Weapon by Scott Handcock has the War Master played by Derek Jacobi meeting River in the ultimate battle...

David Richardson, producer, tells all: “It’s a medley of Masters! In previous box sets River has been travelling back through the Doctor’s incarnations. This time around she is meeting some of the Masters – and we have some amazing firsts in this box set.

"Yes, it’s the first time Eric Roberts has returned to the role since the TV movie in 1996, and the first appearance of Michelle Gomez as Missy in a Big Finish production. With Derek Jacobi as the War Master and Geoffrey Beevers as the decayed Master, it’s an unmissable line-up!”

The Diary of River Song: Series Five is available for pre-order now at £23 on CD or £20 on download.

The Diary of River Song: Series Five can also be purchased as a bundle with The Diary of River Song: Series Four, to be released in August 2018, at the price of £45 on CD and £40 on download (all CD purchases from the Big Finish website unlock a download exclusive from the Big Finish website and app).

And don't forget that this week saw the release of the fourth series of The Diary of River Song, which had River reuniting with her husband, the Fourth Doctor – the universe surely can’t handle all those teeth and curls! And River will meet her toughest threat to date, but is it the Discordia, or one of her fellow academics?

When River Song visits a place where time has vanished, a genie escapes its bottle… The Discordia are freed – nihilistic time pirates, in devilish form, altering the past to make sure they never lose.

This time, River may have met her match. And involving the Doctor can only make things worse…