On the episode of Teen Wolf that aired on July 6th, the Doctors used Tracy, who is played by Kelsey Chow, to cause trouble in Beacon Hills.

Meanwhile, Sheriff Stilinski, played by Linden Ashby, had a date with someone from his past, and Shelley Hennigs' Malia, stepped up after more than one character faced grave danger due to Tracy's rampage.

When the Sheriff was on his way to his date, the details about which he did not reveal to anyone, he bumped into Donovan, who threatened to kill him.

As Donovan was being transported to prison by a police van, the driver of the van's body went numb, and the car went to a stop.

Tracy appeared, and killed the officer then proceeded to go after Donovan. Donovan attempted to escape, but The Dread Doctors found him, and put him through a strange procedure.

At the same time, Lydia and Kira were teaching Malia how to drive. When they reached the police van, they found Tracy's father and called the police, who assumed that Donovan was to blame.

However, when they caught up with Donovan, he simply said "Tracy."

To make matters worse, the gang still had school to worry about, and they had to figure out what to do with Tracy, who Liam and Scott realised was at school.

They tried to talk to her, but she seemed terrified of the Dread Doctors. On closer inspection, the gang discovered that Tracy was a kanima, and she attacked everyone before running away again. After Tracy ran into Lydia and Kira, and attempted to attack them too, Malia finally healed and took off after her, finding her just in time to see The Dread Doctors kill her off.