The Doctor and his companions are trapped in an E-Space universe, struggling to find the co-ordinates which will break the deadlock and take them back to Normal Space. When all else fails, the Doctor suggests programming the TARDIS on the toss of a coin. Before he realises what is happening, that is just what Adric has done ... When the TARDIS arrives at its destination, according to the console read-outs the craft is nowhere – and nowhere is exactly what it looks like ...