টম বাটলার

Dr. Wells’ former protégée, Hartley Rathaway (guest star Andy Mientus), returns to seek revenge on his mentor after being affected by the particle accelerator explosion. Now able to manipulate sound waves, the brilliant Rathaway is a dangerous threat to both Wells and The Flash. Meanwhile, Iris is thrilled when she’s hired by the Central City Picture News as their newest cub reporter. Unfortunately, her editor (guest star Tom Butler) pairs her with a veteran reporter, Mason Bridge (guest star Roger Howarth), who wants nothing to do with her. Cisco recalls his first day on the job at S.T.A.R. Labs when he met Hartley and Caitlin. Joe asks Eddie for a favor, but asks him to keep it a secret from Barry.

While Walter takes an LSD-laced trip down memory lane, a mysterious signal leads Peter and Olivia to the woods.

The teen superhero suffers a bout of memory loss when Kevin uses his newfound power to make people forget everything. Chloe learns of Clark's predicament and sets about teaching him his superpowers - while simultaneously trying to prevent Clark from revealing his abilities to others.

Frank Hellner, the victim of a car accident, has not quite come to terms with being paraplegic. Despite being insulted when his boss offers him a perfect companion in the form of a prototype 'inorganic human' called Valerie 23. He reluctantly tests her out and discovers that her programme features human personality traits, including jealousy.

The Legacy team searches for an individual who is summoning murderous spirits.

A best-selling author, who is the lone survivor of a space shuttle crash, undergoes a personality metamorphosis.