These three exciting new adventures for the Doctor (Colin Baker) and Melanie Bush (Bonnie Langford) take them from the depths of the ocean to expanses of outer space, where they encounter deadly sea creatures, mind-swapped shipmates — and a brand-new companion. 

This box set marks BAFTA-nominated Ruth Madeley’s debut as Hebe Harrison, a sarcastic marine biologist and the Doctor’s first-ever wheelchair-using companion. But her TARDIS travels aren’t off to a good start as the trio get shipwrecked on a flooding moon.

Aussie actor and comedian Rove McManus also makes his Big Finish performing debut and joins the crew in the opening episode, The Rotting Deep, as Jonah Strong, a cowardly and fame-hungry TV star. 

The Sixth Doctor Adventures: Water Worlds is now available to pre-order as a 3-disc collector’s edition CD box set (for just £19.99) or digital download (for just £16.99), exclusively here.  

The Sixth Doctor returns, and he’s thrown straight in at the deep end! Travelling the galaxy with Melanie 'Mel' Bush and their brand-new companion, marine biologist Hebe Harrison, there are wonders to see, dangers to face and plenty of peril beneath the waves. 

The three fantastic stories in this box set are as follows: 

The Rotting Deep by Jacqueline Rayner 

A mysterious SOS summons the Doctor and Mel to an oil rig in the North Sea where a dwindling group of survivors awaits rescue from a lethal menace. One of their number is Hebe Harrison, a wheelchair-using marine biologist who is definitely more than she seems. Can our heroes escape the rig? And just what is killing off the rig's beleaguered crew? 

The Tides of the Moon by Joshua Pruett 

For Hebe's first trip in the TARDIS, the Doctor and Mel take her to the nearest available 'water world' – the Moon, two billion years in the past! Its advanced humanoid inhabitants, the Gilleans, are terrorised each night by their monstrous enemies, the Sheega. Even more worrying is that in a matter of hours, this ocean world will be laid waste by the gravitational interference of the blue-green planet next door... 

Maelstrom by Jonathan Morris 

The Doctor, Mel and Hebe visit the archipelago world of Veludia, only to discover a planet beset by electromagnetic storms where three survivors traverse the seas in a ramshackle 'township'. These survivors are ‘corps’ – bodies used as hosts for minds stored in the vessel’s ‘mind-drive’ – and the Doctor, Mel and Hebe are seen as welcome replacements. But there's something lurking in the waters below, something of rage and power that wishes to destroy them all: the Maelstrom! 

Producer and writer Jacqueline Rayner said: “Inviting a new companion on board the TARDIS is always exciting. Inviting the first wheelchair-user on board the TARDIS is especially exciting! But the most exciting thing of all is to have the incredible Ruth Madeley joining Colin Baker and Bonnie Langford on their travels. 

“Marine biologist Hebe is thrown in at the deep end as the Doctor takes her on a tour of water worlds and makes a big splash – but that's only the beginning, and Hebe's past may shape the future of the entire world...     

“The Doctor only takes the best and the brightest – and the TARDIS is fully accessible.” 

The Sixth Doctor Adventures: Water Worlds is now available to pre-order for just £19.99 (collector’s edition CD + download) or £16.99 (download only) from the Big Finish website.   

Big Finish listeners can save money by purchasing this box set as part of the 14-release Classic Doctors Bundle for £274 (collector’s edition CD + download) or £237 (download only). A 10-release bundle is also available from £165. 

Alternatively, listeners can purchase The Sixth Doctor bundle, containing both 2022 releases in this range, for £38 (collector’s edition CD + download) or just £33 (download only).  

All the above prices include the special pre-order discount and are subject to change after general release.  

Please note that Big Finish is currently operating a digital-first release schedule. The mail-out of collector’s edition CDs may be delayed due to factors beyond our control, but all purchases of this release unlock a digital copy that can be immediately downloaded or played on the Big Finish app from the release date.