[ Gasps ]
Help! Shark!
Billy!
Is that why they call you Sheena of the jungle?
Hey, Sheena, there's something down here.
Forget it. I'm not falling for another one of your dumb jokes.
- Look at it. - What is it?
I don't know.
Looks like a-- a shark's tooth.
No way. I mean, any shark with a tooth that big would have to be--
Somebody's here.
- [ Breathing ] - They go all the way to the door.
[ Sheena ] Whatever it was, I'm sure it left.
I don't know about that. Maybe he just came in.
Wow. Look at this place.
I wouldn't touch that if I were you.
- It smells like the slime. - Really?
How exciting. Now put it back.
No way. I'm gonna look at this underneath a microscope.
No, Billy. We've been down here long enough.
- Let go, okay? - You let go.
- Look, I had it first! - Yeah, and I'm gonna have it last!
- Fine! Have it! - [ Gasps ]
- [ Roaring ] - Duck!
[ Screams ]
It was Billy's idea, Uncle Harold.
Oh, yeah, thanks. Thanks a lot.
It doesn't matter whose idea it was.
The point is, you were told to stay out of the lab.
We're working on some very sensitive experiments in there.
[ Screams ]
Lady Milton. The water--
- In the water! - Uncle Harold!
- I'll go look for this missing lady. - You can't go by yourself.
You may need help, Harry. We'll all go.
Well, it looks like a deserted island.
Race you to the cliff.
Hey. You guys get back here.
We're just scouting ahead.
[ Motor Starts ]
- Jake, what do you think you're doing? - Protecting our experiment.
I'm not gonna let you throw away our work
just 'cause you don't have the guts to see it through.
You can't just leave us on this island, Ritter. This is insane!
Have a nice life--
What's left of it.
- Bye-bye! - Is this some kind of joke?
- [ Ritter Laughing ] - I wish it was.
[ Breathing ]
[ Sheena ] You think anybody's really gonna see a fire from out there?
[ Harold ] This island's uninhabited.
Any passing ship that sees the smoke is bound to investigate.
Why'd Ritter do that to us anyway?
- I thought you guys were partners. - We were.
But I guess Ritter's greed got the best of him.
He wanted the D-13 all for himself.
What's D-13?
I guess after all this you two deserve an explanation.
Take a look out there. What do you see?
Uh... nothing.
- Water. Duh. - Well, you're both right.
And wrong.
The ocean's alive with something called Plankton.
It's a microscopic life-form,
sort of a floating all-you-can-eat buffet for fish.
Ritter and I were working on a new strain of it called D-13...
That can turn carbon dioxide into oxygen at four times the normal rate.
But the growth hormone we used had a side effect.
It caused the creatures that ate the Plankton to grow at an amazing rate.
- Like that blowfish? - Exactly.
Then when you found that giant shark's tooth,
I knew that the plankton had somehow made its way into open water.
Maybe while Luis was cleaning the lab equipment.
At any rate, the marine life in our cove has been feeding on it.
- And growing? - Mm-hmm.
That's why I decided to stop the experiment. It seems Ritter had other plans.
Like what?
Well, like making a lot of money.
D-13 would be worth a fortune to the right people.
How do you make money off of growing giant fish?
You feed people. With enough D-13 in the planet's oceans,
you could end world hunger in ten years.
- That's good, isn't it? - We don't know yet.
It's never been tested on humans. The side effects could be disastrous.
Hey, guys! I think I found something!
It looks like it was some kind of boat.
Lady Milton.
That guy-- He must have jumped overboard before it crashed.
I don't think this boat just crashed.
I think another one of our deep-sea friends got hungry.
- Hey, what are you doing? - It's gotta be here somewhere.
- What? - Something every boat this size has to have.
That's a possibility.
Someone wanna tell me what's going on here?
An inflatable life raft.
Hey, guys.
[ Breathing ]
[ Breathing Continues ]
I found something!
[ Twig Snaps ]
Good work, Sheena. This looks big enough to hold the three of us.
I wonder how it got here.
I thought this island was supposed to be deserted.
Looks pretty rough.
This thing was made some time ago.
Those branches under it should have died under the weight of the canoe.
It's almost as if someone hid it here recently.
And maybe that someone's still here.
[ Rustling ]
Uncle Harold?
Sheena?
I don't think we're alone on this island!
It's covered in that slime.
Billy, you remember--
Billy!
[ Screams, Grunting ]
Billy!
Billy?
[ Groans ]
- [ Billy Screaming ] - Billy!
Billy!
Where are you?
Billy!
Billy?
Billy, where are you?
Billy!
Billy's watch.
Oh, no.
Billy?
- [ Gasps ] - [ Growling ]
Uncle Harold!
[ Gasping ]
Shh, shh, shh, shh.
[ Whispers ] Quiet.
We have to find Billy, get away from here immediately.
I thought that was the idea.
I'm afraid things are worse than we thought.
The D-13 Plankton must have reached this island.
How do you know?
[ Hissing ]
Run. Now.
[ Gasps ]
[ Hissing Continues ]
Hurry. Get inside, before that thing finds us.
- You think that thing got Billy? - Shh, shh, shh.
Reptiles don't see very well,
but they're sensitive to even the smallest vibration.
We have to stay very, very quiet.
[ Rumbling ]
Shh, shh, shh, shh!
[ Rumbling Continues ]
[ Rumbling, Hissing Subside ]
Is it gone?
For now.
We have to get back to that canoe, get off this island.
I'm not leaving here without my brother.
There's a very good chance that Billy--
- What? - Well--
- [ Growling ] - [ Screaming ]
Uncle Harold, no!
[ Screams ]
Sheena, get back!
- Hold on! - Sheena!
Hold on!
- [ Roaring ] - [ Screams ]
I'm not gonna cry.
I'm Sheena of the jungle.
Yeah, right.
Uncle Harold?
[ Hissing ]
[ Gasping, Panting ]
[ Growling ]
[ Gasps ]
- Billy! - Yeah, it's me.
- We gotta get out of here. - What happened to you? Where did you go?
I'll tell you later. Okay? Come on! Let's go!
- [ Hissing ] - [ Screaming ]
[ Roaring ]
Billy, quick! This way!
Get away! Get away!
- Sheena. - [ Roaring Stops ]
- Sheena? - Do you know me?
Your uncle used to talk about you.
You must be Billy.
I'm Luis. I used to work with your uncle.
They've been looking all over the place for you.
What are you doing down here?
Because I don't belong anyplace else.
[ Gasps ]
I worked with Dr. Deep and Dr. Ritter as a laboratory assistant.
They were doing experiments with D-13,
and Dr. Ritter said he'd pay me an extra $100 a week...
if I would take it myself.
[ Scoffs ] Said the only thing it would do was just make me stronger.
You're the one who grabbed me in the bushes?
No, that--
That wasn't me. It must have been the others.
- There are others like you? - Yes.
That's why we gotta get you both outta here before they find you.
Now come on, let's go.
- No. - What?
Uncle Harold is still down here.
You're gonna have to forget about him, Sheena.
The others want to punish him for what he's done.
But it wasn't his fault.
- It was Ritter. - I know.
I tried to explain that to them, but they wouldn't believe me.
Dr. Deep invented the stuff. They hold him responsible.
Then we're just gonna have to change their minds.
[ Sighs ]
They've gotta be up here somewhere.
Wait. What are we gonna do when we get there?
I don't know, but we gotta do something.
[ Grunting ]
[ Grunting Continues ]
Who are you?
What do you want?
Justice.
[ Creatures Murmuring ] Justice. Justice. Justice.
Nice to see you again, Dr. Deep.
[ Roars ]
You have to believe me!
I created D-13 to help mankind, not to destroy it!
Ritter's the one you want!
I didn't know that he was conducting the tests on humans.
You ordered the experiments on us!
Ritter told us so. And your name was on the checks.
You must believe me.
He was my assistant.
He had access to all my papers, checkbooks, everything!
It's too late.
We will decide your fate,
for your invention has determined ours.
[ Roaring, Hissing ]
- No! Stop! - Sheena!
You and Billy stay back!
Ritter used you all as his experiments so he could get rich.
- And we can prove it. - How?
Just think about it-- Why would Uncle Harold, my brother and I...
come to this island if we knew what was going on?
Ritter brought us here to get us out of the way.
Why?
So he could have D-13 all to himself.
He was probably planning to sell it to a company
with no regard for the consequences.
So he could get rich by hurting innocent people.
[ Murmuring ]
We'll go get Ritter.
[ All Murmuring ] Get Ritter! Get Ritter! Get Ritter!
Huh?
No.
No!
No! Stay away!
Stay away from me!
You're not gonna get me. You're not gonna get me!
[ Luis ] Hello, Dr. Ritter.
Going somewhere?
- [ Roars ] - No!
- See you, Luis. - Take care.
Well, that's the last of the antidote.
Good.
According to my calculations,
that should get rid of all traces of D-13.
Okay, uh, what about the giant fish? The others?
Once the antidote starts to work,
they should revert to normal size within the next 48 hours.
How are you feeling?
I couldn't be better. I haven't got a fin or scale on me.
But I've kind of, uh, lost my taste for seafood.
[ Chuckling ]
I promise you guys,
the rest of your vacation will be completely normal.
No mad scientists, no monsters. Just a nice, quiet summer.
Good. Just one thing, though.
What do you think happened to Ritter?
Yeah. He sorta disappeared after those fish people got hold of him.
Well, I don't think we've heard the last of him.
Guys like Ritter always show up sooner or later.
[ Female Barker ] Come on down, folks!
See the fish man!
He's half man and half fish!
And he's alive! Come on down!
Oh, don't be shy, sweetie.
Go on in.
See, he's the fish man! Half man, half fish!
You won't believe it! You have to see it with your own eyes!
Man, what a rip-off.
That looks totally fake.
Captioned by Grant Brown