It's time to finally get Luna back to her mothership.

You know you need energy to power her ship. Luna is jumping up and down with excitement now she knows you can help.

First though, you need to think of some questions about energy.

You still aren't totally sure about which energy to use to get her there...

Luna is so impressed with how much better at coming up with questions you have got!

She gives your leg a big cuddle. CUTE!

"Need energy for go home..." she says, looking up at you with pleading eyes.

You realise you need to do some experimenting with energy before you know which energy will work best.

Luna looks on in wonder as you perform your experiment.

Once you are finished, she looks at you and all the work you've done and says "Nuclear!"

She is suggesting that nuclear energy is the right kind to power her ship.

You need to learn a bit more about nuclear energy yourself, so you go into your Mum's workshop, with all its graphs on the wall...

Luna is impressed with your skills.

"Need to shine light at mothership," she squeaks.

"So that they see your little ship and can beam you up, is that why?" you ask.

She nods her little head.

Okay, so you need to find some nuclear energy... that won't be easy!

But first you need to help Luna with this light thing.

"Do you have light in your spaceship?" you say.

"Yes, but me no understand it," she says.

Aha! You need to teach Luna about light, and then she will be able to use the light on her spaceship to alert the mothership.

You know your dad has some strange machine in a locked metal cabinet in his lab. You remember him saying to Mum one time, "better keep that nuclear stuff locked up!"

You go to the cabinet. Oh no, not AGAIN! Your dad has put one of those quiz-lock contraptions on the door! Thankfully you have learn so much it will be a breeze!

You take the mini-nuclear reactor out of the locked cabinet.

You lead Luna out of the house, while juggling the torch and the reactor in the other hand.

You walk to the crashed space-ship.

It is almost morning... You can't BELIEVE this whole adventure has taken place in one night!

You give Luna a massive hug. Tears stream down her cute little pink cheeks.

"Thank you, friend." she says in her squeaky little voice.

She climbs into the space-ship. You plug the nuclear reactor into the back of her space-ship.

She closes the hatch and presses some buttons.

The space-ship roars... you run back a few steps.

It makes a loud humming noise, then slowly, very slowly, begins to hover in the air. It's working!
Faster and faster now, the ship flies upwards.

Soon enough, you can't make out the ship in the sky. Luna is gone...

You saved a life by forming an alien alliance, and learnt a few things along the way...