Katie Cassidy and John Barrowman Return in Photos from Arrow “Missing”

Promo photos from the next new episode of Arrow have been released. The episode is called, “Missing” and it will air next Wednesday, May 17.

In the episode, “Black Siren (guest star Katie Cassidy) returns to help Chase (Josh Segarra). Felicity (Emily Bett Rickards) organizes a birthday party for Oliver (Stephen Amell) while Lance (Paul Blackthorne) is furious after Rene (Rick Gonzalez) misses the custody hearing for his daughter.”

I swear if Black Siren kills Thea we are going to have some words!

Source: Katie Yu/The CW