Sofia went around the building locking every door and window so no one could get in or out. This was going to be their final hunt.

Mia joined the staff members in the office.

Back in the office the staff were packing up to leave for the day.

Beth: "Gosh that smell is still lingering, I am thinking of moving job because of it.

At that moment Sofia and Ethan walked into the office.

Ethan: "Good evening everyone, I have an announcement. You have all come to the end of your working lives."

Sofia smiled and said: "We will give you all a head start."

She tied back her hair. Both of them had their zips on full display to the employees.

They both started laughing.

Simultaneously they both reached for their foreheads, pulling the zips back and the blue light glowed. The staff looked terrified; some were stunned by what they were seeing others ran for the exit. Mia pretended to be scared and run with the group. The two slitheen rolled their eyes back and started moaning in enjoyment. Soon they both stood up, proud and naked. The staff who hadn't run looked on as their bosses flopped to the floor. Two imitating voices spoke up.

Sofia: "Oh its good to be naked"

Ethan: "Its wonderful sister."

The staff had run out the door into the corridor

Emma: "It won't open"

Sofia: "Don't bother we've locked all the doors"

Emma and Mia started banging on the doors shouting for help

Ethan: "No help is coming"

Beth ran down the stairs with Andrea to warn the receptionist, Charlotte, about the danger

Beth: "Aliens…, Sofia and Ethan are aliens…"

She said out of breath.

Charlotte: "Sofia locked all the doors, she said it was security reasons, she's taken the key.

Beth: "Sofia's dead, she has a big bog monster inside her."

Emma and Mia came down the stairs, they were both panting and sweating

Emma: "We can't get out, we need to get to the roof"

Mia "Agreed"

Charlotte: "I know a way down a service lift.

The staff followed Charlotte through the building the slitheen in pursuit. Suddenly Andrea fell over her own laces. The girls got to the elevator and pressed the button, they told Andrea to hurry, but the slitheen were locked on. They jumped on her and swung at her with their claws. As the elevator doors closed the group heard a scream as Andrea was killed off. The group of them took time to catch their breath back. Mia was holding in a fart, she could feel her skin suit chafe when she ran but had to maintain her disguise. But she had to think of something quick. The elevator ping'd as they reached the top floor, the girls got out and ran down the corridor. Mia knew that she needed to push the girls back downstairs towards Sofia and Ethan. They could see a roof hatch and the girls ran towards it.

Mia "That doesn't open trust me, I know a different way"

Mia lied but the girls looked confused and didn't know what to do, they heard the screams of the slitheen downstairs and decided to follow Mia.

Emma: "Are you sure"

Mia "Yes, of course I am"

Mia lead them down a corridor to a dark room, she closed the door behind her.

Beth: "Where's the way out? "

Mia smiled, at that moment she let out a huge fart. Her face looked relieved.

Mia "I am afraid there's no way out, not for you anyway"

Emma: "Oh no, oh god no!"

She reached up to her brown forehead, there was now a metal zip on display. She pulled on it and blue light emitted from Mia's forehead. She closed her eyes as she pushed her skin down, pulling out her giant claws as her body broke free of Mia's skin. Her bum flopped down and the skin came off. Her green clawed feet standing over the suit. She jumped up and onto Charlotte who was pushed to the ground, Mia started ripping apart Charlotte's body. Charlotte was dead. Beth and Emma ran back down the corridor to the hatch on to the roof. However, Mia had stalled them in time for Sofia and Ethan to get up the stairs. Emma and Beth hid in another abandoned office room. Sofia and Ethan bumped into Mia

Ethan: "Happy hunting sister"

Mia "Oh its wonderful, I've already ripped one apart."

Sofia: "The next one is mine, I can smell them

Ethan: "Yes sweat and fear"

The slitheen walked into the room where Emma and Beth were hiding. They turned on the light. Beth and Emma were under a table, shaking with fear. The three aliens surrounded the table. Sofia grabbed Beth by her foot and dragged her out. She stuck her claws into her forehead and was an instant kill.

Emma tried to get out but was grabbed by Ethan and thrown towards Mia, who finished her in one strike.

The slitheen, now all sweaty had finished their final hunt. Sofia was busy eating Beth.

Ethan: "We need to put these bodies somewhere.

Sofia: "I wouldn't worry about Beth, there's nothing left"

Ethan: "Someone is hungry

Sofia: "I didn't get to eat much of Mia so I am having my fill of this human.

Ethan and Mia slitheen started to gather the bodies and hide them in the dark room. Mia picked up her skin suit and carried it downstairs. Ethan picked up Andrea's body and stuffed it in a bin. Sofia and Ethan waddled into the office and picked up their skins. The three of them went into Ethan's office.

Ethan: "Another fine hunt sisters.

They laid the skins on the floor and climbed back in they reinstated their skins. Just then Sofia's phone rang.

Sofia: "its Blon, we are being called.