Justice League (2001)

S3E17 The Heat Monster

At the Arctic Listening Station XZ-5, a mysterious voice from space sends a cryptic signal ("laser beeeeeam"). Professor Bergstrom, disregarding his assistant's warnings, decides to activate their beam, summoning a living flame alien to Earth. This Heat Monster then demands that the Seaview trigger a bomb beneath the polar ice cap. The brave crew must come together to find a way to stop this formidable threat before it's too late.