This character is described across all versions as having
two heads and three arms, though explanations of how he came to receive the extra appendages differs between versions. The original radio version never explained the second head, but did explain that Zaphod "grew" the third arm in the six months between meeting the character of
Trillian on Earth, and the start of the series. The third radio series implies that he had a third arm when growing upthe fifth has him offer to Trillian that "I'd grow my third arm back for you, baby", when they first meet. In the novel, he said the third arm was "recently ... fitted just beneath his right one to help improve his ski-boxing." According to the original ''Hitchhiker's'' radio series script book, an ad libbed comment by Mark Wing-Davey in the
eighth radio episode ("Put it there, and there, and there, and there! Whoa!") would suggest that Zaphod had grown a fourth arm. In the television series,
Ford Prefect simply remarks to Zaphod that "the extra arm suits you."
Eoin Colfer wrote and published an official 6th book for the Hitchhiker's series, in which it is implied Zaphod's third arm may have originally been grown so that he would have one hand for each of
Eccentrica Galumbits's breasts. In
Infocom's
text adventure game
version of the story, Zaphod blends in on Earth by hiding his second head in a covered bird cage (an alternate Trillian also refers to this in
Mostly Harmless). In the novel
The Restaurant at the End of the Universe, the ghost of Zaphod's great-grandfather also has two heads. This and other information presented in the narrative prose seem to indicate that having two heads is a common – possibly even universal – trait of Zaphod's species. For the 2005 film, it is hinted that Zaphod "created" the second head himself when shutting off the parts of his mind that contain portions of his personality that "are not presidential", but he wanted to keep these traits, so he hid his second head under his neck and wears a large collar or scarf to keep it hidden. As such, the film is also the only version that explains the
second head. In this filmed version, the second head appears underneath the first, roughly between his chin and the top of his chest, popping up when the first head is flipped backwards. The third arm is hidden underneath Zaphod's clothing, appears to be controlled by the second head, and only appears a few times, such as for tormenting
Arthur Dent, piloting the spaceship
Heart of Gold, or preparing a Pan-Galactic Gargle Blaster. The second head was sawed off by Humma Kavula during the film. In
And Another Thing..., Colfer's addition to the book series, a photo is mentioned which shows Zaphod with the second head replaced by that of a woman. It is implied that Zaphod may have surgically attached this woman's head to himself, before realising he liked the idea of a second head better than he liked her, and swapping her for a reproduction of his original head.
And Another Thing... is also the only book in the series in which Zaphod has only one head. His left head is said to have been removed so that 'Left Brain' (or 'LB') can function as the new computer of the
Heart of Gold. Zaphod wears unique clothing that contains a mixture of bright and contrasting colours to make him stand out and be the centre of attention wherever he goes. In the television series, he wears the same outfit throughout each of the episodes; however, in the film, his clothes, their style and their colour scheme change several times. == Achievements ==