Doctor Who and the Doomsday Weapon

In 1974, Colony in Space was released by Target Books under the title Doctor Who and the Doomsday Weapon.

Cover blurb
The evil MASTER has stolen the Time Lords' file on the horrifying DOOMSDAY WEAPON with which, when he finds it, he can blast whole planets out of existence and make himself ruler of the Galaxy! The Time Lords direct DOCTOR WHO and Jo Grant in their TARDIS to a bleak planet in the year 2471 where they find colonists from Earth under threat from mysterious, savage, monster lizards with frightful claws! And hidden upon this planet is the DOOMSDAY WEAPON for which the MASTER is intently searching...

'DOCTOR WHO, the children's own programme which adults adore...' Gerard Garrett, The Daily Sketch

Cover blurb
TERRORIZER OF THE UNIVERSE

While Doctor Who was exiled on Earth and restricted to the Twentieth Century, the charming but hypnotically evil Master, whose one ambition is to destroy Doctor Who, walked off with the Doomsday Weapon file.

Doctor Who, commanded by the Time Lords to stop the Master - at any cost - is directed to a bleak planet in the year 2471. Hidden somewhere on that planet is the Doomsday Weapon - lurking somewhere in that Time Zone is the Master! Will Doctor Who, hampered by alien monsters, locate and dismantle the Doomsday Weapon before the Master triggers it? It's a terrifying countdown affecting all mankind - past, present and forever!

Cover blurb
The evil MASTER has stolen the Time Lords' file on the horrifying DOOMSDAY WEAPON with which, when he finds it, he can blast whole planets out of existence and make himself ruler of the Galaxy! The Time Lords direct DOCTOR WHO and Jo Grant in their TARDIS to a bleak planet in the year 2471 where they find colonists from Earth under threat from mysterious, savage, monster lizards with frightful claws! And hidden upon this planet is the DOOMSDAY WEAPON for which the MASTER is intently searching...