Oh, I left that out too, didn't I?

Lois and Martha were on a plane to go to some sort of speech that Martha had to be at. Fine/Brainaic (one of his doubles) started flying the plane towards somewhere cold, or in the opposite direction of where they were supposed to go--I'm not sure.

Suddenly, the air is slowly seeped out, and Martha collapses. Lois is next to collapse, before she can reach the air mask or anything else.

And that's the last you see of them.

Basically, everyone is almost dead by the end of the episode.