The Liberator detects a mysterious spiky metal globe floating in space. Avon deduces that it is an artificial planet, but can't raise any communication. Then Cally disappears - apparently abducted inside the "planet". As well as affecting minds, this "Ultraworld" turns out to be capable of stealing them - and using the zombified bodies of space travelers to trap others. But the crew must ultimately face the menace that rules from the center of the Ultraworld... Written by
Did You Know?
Michael Keating was suggested for the role of Vila after appearing in the Doctor Who serial, The Sun Makers. The tunnels in Ultraworld (apparently Michael Keating's least favourite Blake's 7 episode) and those featured in The Sun Makers share the same filming location, Camden Town Deep Shelter, London, NW1. See more
I'm too young to be absorbed.