
face. "Sorry about that, Jim." His expression grew more serious. "But there are at the very least three or
four liters total of blood unaccounted for, particularly in Lara Krovozhadny's-the woman's- case. She
hardly had a drop on her-of her own blood, that is. Most of what was on her belonged to Yoshi." Kirk
looked disconsolately at his half-eaten sandwich. "Any ideas as to why that is?" McCoy shook his head.
"Obviously, someone removed it," said Spock.
McCoy eyed him with disgust and brutally thrust a fork and knife into his chicken. "Well now, that
thought occurred to me, too, Spock. But who would want to steal blood? Our friend Adams?" "He is a
likely suspect." "Our only living one, actually. And, intriguingly enough, he's severely anemic. I've had to
give him a massive transfusion." McCoy's expression became thoughtful as he speared a piece of chicken
and chewed it. "It's a weird bug he has. I've never seen anything like it-and frankly, I have the gut feeling
it's been genetically engineered. Stop rolling your eyes, Spock. The lab's running tests on it now. At first I
thought his symptoms indicated porphyria, but they're not quite right." Kirk frowned. "That's a new one
on me. Por-what?" "Porphyria. I doubt you've heard of it before. Of course, I'm sure Spock has-"
"Porphyria," Spock recited. "A genetic mutation affecting the production of enzymes required for the
synthesis of heme-" "Thanks, Spock, but that wasn't an invitation to lecture." McCoy shook his head and
turned back to the captain. "Anyway, like Spock said, porphyria is caused by a genetic mutation, not an
organism. An interesting disease, though. Explains how stories of vampires and werewolves got started.
A person with porphyria is sensitive to light-so sensitive that it can literally burn holes in the skin."
"Vampires?" Kirk frowned. "I thought that was a sort of bat that lived in South America." "I'll bet your
mother never told you about Santa Claus, either," McCoy retorted.
The Vulcan explained. "A vampire is indeed a South American bat, but the term also refers to a
legendary creature-a human who each night leaves the grave to feed on the blood of the living, employing
similar methods to the vampire bat. At sunrise, the vampire must return to its crypt, or be destroyed by
the light. Its victims in turn become vampires themselves." He paused. "Would you also like to know
about Santa Claus?" McCoy groaned audibly.
"No thanks. I appreciate the folklore lesson," Kirk said impatiently, "but what does this have to do with
Adams?" "He suffers from many of the same symptoms," McCoy answered. "Such as photosensitivity.
The photochemical reaction of light on his skin literally bums holes in him-he has a number of lesions. The
presence of light is excruciatingly painful for him. If exposed long enough, he would die. A porphyria
victim is also extremely anemic-which Adams definitely is-and the disease makes the gums recede from
the teeth. But Adams' disease seems to be much more insidious. I'm running some tests now to see what
we can do to help his body produce its own heme because if the anemia worsens as its present rate, we'll
be giving him a liter of whole blood every five minutes." "What about his mental state?" Kirk asked.
"You mean is he capable of killing the others? I don't know, Jim, I really don't. He seems lucid one
minute, disoriented the next, but I can't really say he seems violent. Of course, slitting one's throat is
hardly a preferred method of suicide." "Regardless, I'm going to question him," said Kirk. "This whole
situation on Tanis smells too fishy." "I don't deny that." McCoy put down the fork and knife. "What
exactly are they doing on Tanis? What's the official word?" "No official word at all," Kirk said. "I've
advised them of the situation and I'm waiting to hear back, that's all. They aren't telling much of anything."
"The planet is charted, but listed as uninhabited. There are no records of a base being constructed,"
Spock said. "Yet the fact that a hidden underground laboratory facility exists indicates one of two things:
either Starfleet purposely intended the facility's location to remain secret-which would explain why we
were instructed to avoid contact with it, medical emergency notwithstanding-or the base was built without
Starfleet's knowledge. Considering our orders, the first explanation is the most logical. Most probably,
the base was built in order to do secret research." "The question is, what type of research?" McCoy said.
"They've got some sort of microbiological facility down there. And the fact that our boy Adams is