Village of the Damned - S2.E13

An angry Dr. Joseph Severn, a bologist in charge of a World Food Organisation project in Ontario, transmits a message resembling that of an insane man after he discovers a crate of liquid pesticide in a warehouse on his experimental farm, which Alexander Addington helped to fund. After Alexander adjourns a business meeting, Bennett informs Addington of the tape and its contents, which, after listening to it, prompts Alexander to send the team to the experimental farm to investigate. What they discover is something far more sinster.