The Parasite

The Unknown Entities

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DAY 418 - 20XX / 7 / 28
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It's been a couple of days and Martins able to walk again. This is because of the fact that none of the bones in his legs were injured. With his right hand however... he hasn't had the same luck. His left is alright however he broke his left thumb and index finger, making some tasks quite difficult for him. I have been assisting him where I can. mainly making food for him because he managed to get used to eating normally with only 3 fingers. Amelia has been spending most of the last 4 days trying to communicate with HQ to get Martin healed properly. 
"Any luck?"  Me and Martin say in almost perfect sync when Amelia arrives. 
"Sadly not. They were supposed to arrange a way for me home today is well."  She says with a hopeless voice. Eventually Martin finishes his food and then as he gets up we get a message.

A unknown voice booms into our comms
"Hello Niko Hern, Martin Alloy and Amelia Heart. I have seen your request to return to HQ. However we cannot grant you permission to return at this time. This is because we have recognised there are 6 lifeforms on-board. The computer recognises you as 3 of them... However we have reason to believe the last 3 are unknown entities. You will be granted permission to return once you confirm what the 3 lifeforms are. This is your new mission!"

Amelia and Martin seemed rather confused for the quite simple instructions that had been set. 
"Did you guys hear that too"  He said with an even more confused face.
"The static? Yeah, but I couldn't understand if it was a message or something random."  she said answering Martins question. 
"How about you Niko? Did you also hear the static?"  Amelia then pushed the question onto me. But now I was the one with a confused look on my face.
"No, I didn't hear static"  They both looked at me and I continued on "It was someone from HQ, I didn't recognise their voice. However they were saying something about the fact that they had just received your message Amelia. But they couldn't allow us back to earth... because we aren't the only ones on the ship."

They both looked nervous, of course they would be nervous. There was something or someone on this ship that shouldn't be. There was no way for them to access the shuttle without us knowing... So how did they get onboard? was it the loud bang from when I heard Martin scream? Had they arrived with Amelia when she got onboard. I also heard a bang when I was on my way back from the meteor. Then again it could be all of those.