You are going to Watch Thunderbirds Are Go Episode 12 online free episodes with HQ / high quality. Stream cartoons Thunderbirds Are Go Episode 12 Online Under Pressure. A giant heavy metal extraction plant moving along the seabed collecting toxic waste has a compartment fire leaving it out of control heading for a undersea chasm. Thunderbird 2 is dispatched with Thunderbird 4 to effect the rescue of the crewman, Ned Tedford again, and make safe the toxic waste. Lady Penelope investigates the company that owns the extraction plant and associated treatment facility and uncovers an old nemesis as it’s head with plans to pollute water supplies.