Kayehla Janees

Beth Halloran was a young woman who was woken up in the night by a loud noise from inside her flat. After sending her husband, Mike, to investigate, Beth called the police. When the police came, one of the burglars had been murdered and the other severely injured, Mike was unconscious and Beth couldn't remember anything. The police called Torchwood to deal with the case. Gwen interviewed the surviving burglar, who made her promise to keep Beth away from him before dying.

Beth was taken to Torchwood base to be interviewed but swore she didn't know anything. However, certain strange things happened - the lights blew whenever she got upset, Owen was unable to get a syringe or even a scalpel inside her and even Janet the Weavil cowered.

Jack decided to use a mind probe, which when pushed deep enough, made Beth recite a name, rank and serial number, as well as making her arm open to reveal alien technology. Jack explains that she's a an alien sleeper agent with false memories, sending information back to her home planet so that they'll know everything about the planet when they invade. Beth is shocked when she finds out, ans asks them if they can make her human, but Jack says no.

Toshiko suggests that they freeze her, and wake her up when they know how to make her human. Jack agrees and they go ahead with it. Everything works out well, however when they check on Beth later, she's vanished. Owen realises that as she knew about Torchwood, she could fool the equipment.

Beth has gone to Mike's bedside to say goodbye to him. However, when she hugs him, she accidentally murders him when her arm turns into a savage blade. The Torchwood team arrive and capture Beth.

At the same time, Jack hears reports of mysterious explosions and murders and realises that the rest of the cell have activated. Jack asks Beth to track them, and she reluctantly uses her arm to discover that there's only one left. They track the remaining sleeper agent, a man named David. Jack deactivates him but he still creates an explosion, which Jack, Gwen and Beth only just escape.

Back at the Hub, Gwen is set to refreeze Beth, but Beth tells her it's too dangerous. She pretends she's going to kill Gwen, to trick the rest of the Torchwood team into shooting her.