Classic TV - Tales Of Tomorrow - "Blunder" (1951)
Scientists race to warn a colleague that his experiment could destroy life on Earth.
https://www.imdb.com/title/tt0717022/?ref_=fn_al_tt_1
This video is in the Public Domain.
https://www.imdb.com/title/tt0717022/?ref_=fn_al_tt_1
This video is in the Public Domain.