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.
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.