Over What?

This week I asked Gennita to give me a few things with which to do my calculations regarding Hell's condition, mental and physical.

Here are her clues:

Overheard: Jed making plans to meet with Nikki Harden. In private and not in an office.

Overlooked: Jed's past. There is an explanation, dear Comcen Dude, why, in the declassified file, VHIS, certain intruders react so strongly when they get near His Jedness.

Overture: The name of a certain program.

Overdrive: Those migraines. Think about it.

Overman: It's a book. And I'll let your very smart fans discuss why I brought this up.
;-) Yes, it's a challenge, DUDE. You on?

Huh. I think Gennita just challenged us, dudettes. Let's solve this puzzle!