Doctor Who: Beneath the Surface

Enjoy some well-deserved downtime with all three classic battles with the Silurians and the Sea Devils! In Doctor Who and the Silurians─available in color for the first time─the Doctor (Jon Pertwee) is summoned to an underground research center and soon discovers that a nearby cave system conceals a colony alled the Silurians, awakening from millions of years of hibernation. The Sea Devils finds the Doctor (Pertwee) and Jo Grant (Katy Manning) paying a visit to the Master at a top security prison. But the Doctor soon finds himself pitted against the Sea Devils, an ancient race of reptiles intent on eliminating humankind. Travel to Sea Base Four in Warriors of the Deep as the Doctor (Peter Davison), Tegan and Turlough find themselves accused of being enemy agents. However, there is a greater threat to humankind: the Silurians and the Sea Devils have formed an alliance. All 17 episodes are digitally remastered for picture and sound quality. Extras include commentary by actors, directors and many others, several "making-of" featurettes, and more rare treasures from the Doctor Who vault.

Doctor Who and the Silurians
Summoned by the Brigadier to an underground research centre at Wenley Moor, the Doctor and Liz Shaw learn from its director, Dr Lawrence, that work on a new type of nuclear reactor is being hampered by inexplicable power losses and by an unusually high incidence of stress-related illness amongst staff.
Investigating a nearby cave system, the Doctor discovers it is the base of a group of intelligent reptiles, termed Silurians, who went into hibernation millions of years ago but have now been revived by power from the research centre.
The Doctor strives for peace between reptiles and humans and manages to gain the trust of the old Silurian leader, but then a rebellious young Silurian seizes power and releases a deadly virus that threatens to wipe out humanity.
The Doctor finds an antidote, but the Silurians retaliate by taking over the research centre and preparing to destroy the Van Allen Belt, a natural barrier shielding the Earth from solar radiation harmful to humans but beneficial to reptiles. The creatures are tricked into returning to their caves when the Doctor overloads the reactor, threatening to cause a nuclear explosion. The Brigadier, to the Time Lord's disgust, then has the Silurian base blown up.

Doctor Who and the Sea Devils
The Doctor and Jo visit the Master in his high-security prison on an island off the south coast of England and hear from the governor, Colonel Trenchard, that ships have been mysteriously disappearing at sea.
Investigating, the Doctor learns from Captain Hart, commander of a nearby Naval base, that the sinkings have centred around an abandoned sea fort. He and Jo then visit the fort and are attacked by what one of the men there terms a Sea Devil - an amphibious breed of the prehistoric creatures encountered by the Doctor shortly after his exile to Earth.
The Master, aided by a misguided Trenchard, is stealing equipment from the Naval base in order to build a machine to revive the Sea Devils from hibernation.
The Doctor takes a diving bell down to the Sea Devils' underwater base to try to encourage peace. His efforts are frustrated by a depth charge attack ordered by a pompous politician, Walker, but in the confusion he manages to free a captured submarine and escape back to the surface.
The Sea Devils then capture the Naval base, and the Master has the Doctor taken back to their control centre, where he forces him to help finish the machine. The Doctor sabotages the machine and the two Time Lords escape together just as the base is destroyed in an explosion.

Warriors of the Deep
The Doctor, Tegan and Turlough arrive at an underwater Sea Base on Earth, where a scientific and military team led by Commander Vorshak are monitoring a rival power bloc. The team undergo regular missile launch test sequences to ensure that they are ready at all times to combat an attack.
Three Silurians led by Icthar - the surviving member of a Silurian triad - revive a colony of Sea Devil Warriors in order to invade the base and use its weapons to attack the opposing power bloc, thus provoking a global war that will allow the reptiles to conquer the Earth.
The Doctor uses ultra-violet light to destroy the reptiles' giant electrified sea beast, the Myrka. When it appears that there is no other option, he also reluctantly suggests using hexachromite gas to kill the remaining invaders. While this is done, he links his own brain into the base's computer to prevent the firing of the missiles.

Doctor Who and the Silurians

Directed by Timothy Combe
Costumes by Christine Rawlins
Film Editing by Bill Huthbert
Incidental Music by Carey Blyton
Produced by Barry Letts
Script Editing by Terrance Dicks
Title Music by Ron Grainer and the BBC Radiophonic Workshop, arranged by Delia Derbyshire
Written by Malcolm Hulke

Doctor Who and the Sea Devils

Directed by Michael E Briant
Costumes by Maggie Fletcher
Film Editing by Martyn Day
Incidental Music by Malcolm Clarke
Produced by Barry Letts
Script Editing by Terrance Dicks
Title Music by Ron Grainer and the BBC Radiophonic Workshop, arranged by Delia Derbyshire
Written by Malcolm Hulke

Warriors of the Deep

Directed by Pennant Roberts
Costumes by Judy Pepperdine
Incidental Music by Jonathan Gibbs
Produced by John Nathan-Turner
Script Editing by Eric Saward
Title Music by Ron Grainer and the BBC Radiophonic Workshop, arranged by Peter Howell
Written by Johnny Byrne