Episode 2
Series Episode Number: 199World Premiere: Sat 23 Mar 1968 - 5:15pm BST [BBC One] (United Kingdom)
Running Time: 23 minutes 8 seconds
7.90 Million (UK)
Appreciation Index: 55 (UK)Chart Position: 40 () (UK)
Recorded on Sat 02 Mar 1968 in Lime Grove D
Archive State: Missing
As the situation worsens at the refinery, Chief Robson refuses to halt the gas flow. Elsewhere, the weed extends its influence and Mrs Harris receives sinister visitors.
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