Accepting the mission

Dr. Zed: "Why don't we try that again? This time with more science! We gotta get these sorry bastards a cure!"

Mission

Dr. Zed: "You know the drill by now. But get me some tougher mutant parts this time! Maybe that'll help."
Dr. Zed: "I know Tannis is thinkin' that Cassius fella is the hottest little pipette to ever do science, but I think I'm a better match. Hmm. Maybe after I cure these sorry bastards I can use what I learn to give her the plant-monster army she's always dreamed of! Yeah."

(Infected Lichenthrope parts collected)

Dr. Zed: "That looks like enough parts for my purposes. Let's see if we can't cure them monstrosities AND see if I can't find my way into Tannis's, uh, good graces. Heh-heh."

(Bring body parts back to Dr. Zed)

Dr. Zed: "Alright then. Let's take another little whack-aroni at this."

(Administer Dr. Zed's antidote)

Dr. Zed: "Give this concoction a shot, heh-heh! Get it? Shot? Nevermind. Just do it."

(Kill failed experiment)

Dr. Zed: "Well, shoot. Guess I'd better quit while I'm ahead. And by that I mean while I've still got a head. Maybe I'm just not cut out for this. Oh, who was I kidding? Tannis ain't interested in a dummy like me. Maybe it's time I finally get the ol' medical license reinstated."
Tannis: "Yes. Hello? I must ask, who has been discarding these utterly... magnificent dead specimens?"
Dr. Zed: "Oh, uh, well, that would be... me. Hi there, Tannis."
Tannis: "Well... hello."

End of mission

Dr. Zed: "Yeah, yeah! Go on!"