FADE IN:

A basement laboratory.  It's full of beakers and test tubes and
flasks.  There is a large cage housing an iguana.

ROBERT, who fancies himself a mad scientist, is in his lab,
wearing a lab coat.  He opens a drawer and pulls out a syringe
and needle.

He uses these to extract a blood sample from the iguana, which
he squirts into a test tube.


BEGIN CREDITS.


SERIES OF SHOTS

A) Robert starts to process the blood.  He adds a chemical to
the test tube.

B) The blood solution is being separated in a simple centrifuge.

C) Robert removes the top layer of material in the test tube
with a pipette.

D) He spreads the material across a series of microscope slides.

E) He adds a different chemical to each slide.

F) He looks at one of the slides through a microscope.

G) He fills a vial with some clear liquid.

H) CU on the vial sitting on the counter.  It is labeled "Iguana
Extract."


END CREDITS.


                                                        FADE OUT.


FADE IN:

It's morning in modern suburbia.  Cloned houses march up one
side of the street and down the other.

CHRISTOPHER, who lives next door to Robert, comes out of his
house.  He's dressed in business casual and he's carrying a
briefcase.  He gets in his car and drives away.

The curtain in Robert's window, through which Robert was
watching Christopher, falls back into place.


EXT. ROBERT'S BACK YARD - DAY

Robert leaves his house.  He heads for the fence separating his
yard from Christopher's yard.


EXT. CHRISTOPHER'S BACK YARD - DAY

Robert gets over the fence.  He goes right to the back door.  He
picks up a garden rock and flips it over.  It's one of those
fake rocks with the key hidden inside.  He uses the key to let
himself into Christopher's house.


INT. CHRISTOPHER'S HOUSE, KITCHEN - DAY

Robert goes straight for the refrigerator.  He retrieves the
milk and sets it on the counter.  He pulls the iguana extract
vial and a syringe from his pocket.  He puts a squirt of extract
into the milk.  He puts everything away then leaves.


EXT. CHRISTOPHER'S HOUSE - NIGHT

Christopher arrives home from work.  He's tired.  He drags
himself into the house.


                                                   MATCH FADE TO:


EXT. CHRISTOPHER'S HOUSE - DAY

A new day dawns.  Another chance for mischief.


INT. CHRISTOPHER'S HOUSE, KITCHEN - DAY

Christopher prepares his morning bowl of corn flakes.  He pours
some of the tainted milk on his cereal.  He apparently doesn't
notice any difference in flavor.  Maybe it's because he's too
busy reading the morning paper.


INT. ROBERT'S HOUSE, KITCHEN - CONTINUOUS

Robert is peering out through the window with binoculars.  He is
watching Christopher eating breakfast.  He sets down the
binoculars so he can write in his log book.

                        ROBERT (V.O.)
          Day one: the subject has ingested the iguana
          extract for the first time.


LATER

Robert is writing in his log book again.

                        ROBERT (V.O.)
          Day four: the subject appears to be
          experiencing changes in body temperature
          control.


INT. CHRISTOPHER'S HOUSE, KITCHEN - CONTINUOUS

Christopher is fixing dinner.  He is wearing a sweater.

                        ROBERT (V.O.)
          He now wears additional clothing for warmth
          at home.


EXT. ROBERT'S BACK YARD - DAY

Robert wanders out into his back yard.  He goes to the fence
between his and Christopher's yards.  He looks over the fence.


EXT. CHRISTOPHER'S BACK YARD - CONTINUOUS

Christopher is lying on a lawn chair, soaking up the sun.

                        ROBERT
          Hey, Chris.  How's it going?

Christopher turns to look at Robert.

                        CHRISTOPHER
          Hey, Bob.  Just felt like getting some sun.
          I've been having trouble feeling warm
          lately.


INT. ROBERT'S HOUSE, KITCHEN - DAY

Robert is adding to the notes on his experiment in his log book.

                        ROBERT (V.O.)
          Day five: the subject has started sunning
          himself.


INT. CHRISTOPHER'S HOUSE, BATHROOM - NIGHT

Christopher looks at himself in the mirror before going to bed.
He looks closely at his eyes.  He doesn't feel quite right.  He
leaves the bathroom...


IN THE BEDROOM - CONTINUOUS

...and enters his bedroom.  He crawls into bed and turns off the
light.


LATER

The next morning, he wakes.  He sits on the edge of the bed and
absent-mindedly scratches his arm.  He doesn't notice the scaly
patch on his arm.


INT THE BATHROOM - DAY

Christopher is in the shower.  His back is covered with scaly
patches.


IN THE BEDROOM - NIGHT

Christopher is restless.  He's tossing and turning in his sleep.


LATER

It's morning and Christopher is still asleep.  Until his eyes
suddenly open wide.  They're reptilian.


INT. ROBERT'S HOUSE, KITCHEN - DAY

Robert is sitting at the table, writing.

                        ROBERT (V.O.)
          Day 27: the subject disappeared three days
          ago.  Based on a story in the newspaper...

CU on the newspaper with a headline "Lizard-man Spotted in
Desert."

                        ROBERT (V.O.)
          ...I'll be heading to the desert to continue
          my research.


                                                        FADE OUT.


                             The End