Matthew Harrison

The Legends struggle with their consciences when they find out they must kill a 14-year-old boy in order to save the world.

While Carlos struggles emotionally, he and Kiera must stop Liber8 from unleashing a chemical attack on the city.

Believing that key information about his father's past was lost when his memory was erased, Lex decides to join an experimental programme with Dr Garner to regain the information so he can turn his father over to the FBI. Knowing that Lex will discover his secret if he regains his memory, Clark tries to stop him but is caught by Lionel and the doctor.

The investigation into the murder of a chrome leads Kennex and Dorian to discover the suspect is using his victims' DNA to pursue perfection.