Doctor Who (1963–1989)
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The Exploding Planet 

The Doctor and Vicki enlist the aid of the Chumblies to rescue Steven from the Drahvins and then find a way off the planet before its destruction.


Derek Martinus


William Emms


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Episode cast overview:
William Hartnell ... Dr. Who
Maureen O'Brien ... Vicki
Peter Purves ... Steven Taylor
Stephanie Bidmead Stephanie Bidmead ... Maaga
Marina Martin Marina Martin ... Drahvin One
Susanna Carroll Susanna Carroll ... Drahvin Two
Lyn Ashley Lyn Ashley ... Drahvin Three
Robert Cartland Robert Cartland ... Rill Voice (voice)
Barry Jackson ... Jeff Garvey
Angelo Muscat Angelo Muscat ... Chumbley Operator
Willie Shearer Willie Shearer ... Chumbley Operator (as William Shearer)
Pepi Poupee Pepi Poupee ... Chumbley Operator
Tommy Reynolds Tommy Reynolds ... Chumbley Operator


The Doctor and Vicki enlist the aid of the Chumblies to rescue Steven from the Drahvins and then find a way off the planet before its destruction.

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Release Date:

2 October 1965 (UK) See more »

Company Credits

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


This episode was wiped by the BBC and no copy of it is known to exist. See more »


[first lines]
Maaga: Why do you not give up, Earthman?
Steven Taylor: [gasping, and heavy breathing] I'd rather face the Chumblies than you any day.
Maaga: [evil laughter] That will not work now. The pressure has locked the door. You must surrender, or die!
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User Reviews

Galaxy 4: Part 4 - Solid story with good regular cast performances.
19 August 2014 | by A_Kind_Of_CineMagicSee all my reviews

Review for all 4 parts:

Galaxy 4 is a four part story beginning with Four Hundred Dawns.

This is a sort of run-of-the-mill adventure where the TARDIS crew are caught up in a dispute between 2 alien races. It is well acted by the regular cast and quite neatly scripted. Overall the story is presented pretty well and has some interesting ideas such as appearances proving to be deceptive. Most aspects are done effectively enough including the representation of the leader of the Rill. Maaga, the leader of the Drahvins is reasonably good but the rest of the Drahvins are rather weak. Although the Chumblies are unimpressive creations they are quite cute robots which seem now like precursors of Star Wars cute 'droids' R2D2 and BB8 and I quite like them.

The development of the Doctor's new companions continues to create interest. Steven is one of my favourite companions and Purves' performance in the part is establishing the character really well by this stage. The way the Doctor, Steven and Vicki interact and deal with situations provides quality.

The story is no classic by any means but is a pretty well executed adventure in many respects so I am not sure why it is so disliked by many fans. It is a reasonable effort I think.

All 4 Episodes - 7/10.

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