The premise of Space: 1999 centres on the plight of the inhabitants of Moonbase Alpha, a scientific research centre on the Moon. Humanity had been storing its nuclear waste in vast disposal sites on the far side of the Moon, but when an unknown form of magnetic radiation is detected, the accumulated waste reaches critical mass and causes a massive thermonuclear explosion on 13 September 1999. The force of the blast propels the Moon like an enormous booster rocket, hurling it out of Earth orbit and into deep space at colossal speed, thus stranding the 311 personnel stationed on Alpha. The runaway Moon, in effect, becomes the “spacecraft” on which the protagonists travel, searching for a new home. Not long after leaving Earth’s Solar System, the wandering Moon passes through a black hole and later through a couple of “space warps” which push it even further out into the universe. During their interstellar journey, the Alphans encounter an array of alien civilizations, dystopian societies, and mind-bending phenomena previously unseen by humanity. Several episodes of the first series hinted that the Moon’s journey was influenced (and perhaps initiated) by a “mysterious unknown force”, which was guiding the Alphans toward an ultimate destiny. The second series used simpler “action-orientated” plots.