Actually, you don't want to fire your minions. The infuriating hero's office down the street gives out unemployment benefits to people who have been fired, and we certainly wouldn't want to make the hero look any more heroic that he already seems to be. Here are the best ways to get rid of an overseer, minion, or underling you can't stand.
1. Have an elite squad of secret ninjas ready at all times. Instruct your best ninjas to "take care" of anyone you don't like, or anyone who seems to be gaining too much popularity with the masses. (Problem solved.)
2. Can't afford the squad of ninjas because the hero just destroyed your latest gadget? Never fear, we have... other... ways of bumping off employees. Simply make your underlings miserable, and eventually they'll quit on their own.
3. There is a risk that a disgruntled minion will join the hero's side once they quit working for you, so you must be prepared. (Really, #1 is the best option.) You can also throw your ex-minion into the deeps of your dungeons, and leave them there to rot. There is a slim chance your minion will escape, but if you have been diligent in not allowing him to make friends with anyone, he won't have anywhere to go. Meanwhile, throw a huge party for the underlings you will be retaining, calling it a 'farewell party' for Minion #1. Everyone will simply think Minion has already left, and will proceed to feast on roast boar and beer. By the next morning, no one will remember the reason for the party, and they'll be completely loyal to you. (As if, of course, they weren't already.)
4. Risk: Hero may infiltrate defenses during party. Cancel party.
5. The easiest way to fire a minion is to shove him into a bonfire, or show him to a room with an expert firing squad. However, this is not good for PR with the rest of the minions, so you'll want to be discreet. If you aren't going for good Public Relations and instead want to rule simply by fear, this may be the best option for you! (And meanwhile, you'll get to have the roast boar and beer yourself.) Ahhh... it's good to be the Evil Overlord!
