INCOMING MESSAGE:
This is Dr. Grey transmitting from the bridge of the Humanoid space craft. The Humanoids are gone! Their de-evolution drug backfired and turned me into a savage beast and they fled in terror!

I've found an antidote to their injections and treated myself and the other prisoners. We're all safe now.

I'm leaving this space craft in orbit around the earth for you to rendezvous with ... but I won't be here when you arrive. I'm going to pay a little visit to the Humanoid's home planet.

I have enough of their de-evolution drug (and antidote) to turn myself back into the beast and erradicate those alien creeps for good! (Password: planet)