AllMovie

The New Avengers wrapped up its first season with an episode which writer Dennis Spooner has confessed was based on "Attack of the Alligators",an installment of the "Supermarionation" series Thunderbirds (with, it would seem, a bit of "Monty Python" thrown in). An illicitly developed growth liquid seeps into the London sewer system, creating a giant, deadly rat. Kidnapped by the scientists who created the liquid, Purdey (Joanna Lumley) is set up as bait for the king-sized vermin--and our girl must also contend with a passel of killer tomatoes.