"Below the ground, deep below the ground, among ancient rock strata, something bubbled. Almost as if in anticipation..."
The 6th Doctor and Mel arrive at the Thorulm Complex in Iceland, where a crazed industrialist plans to destroy a new, environmentally-friendly powerstation — hoping to place the blame on eco-terrorists — only for Stahlman's Gas to be released, transforming its victims into Primords...
- The story was set in 2010 — when written, an almost-impossibly far-future date twelve years away (heck, we hadn't even had the Millennium, then!).