 Subsequent episodes revealed that they eventually disowned Nebulous due to his continued interest in the sciences, and he apparently has never seen them since

The Infernons are a race of aliens made out of fire (the name "Infernon" comes from "Inferno") from the planet Burnos.Because they are made out of fire, they have to cover themselves with black metallic cloaks.If they are stoked regularly, an Infernon can live almost indefinitely, but the race is nearly extinct due to the Great Crazy Foam Monsoon of 2095.