- Season 4 Episode 12
ROY HARPER RETURNS; NYSSA MAKES HER MOVE
The team faces off against a formidable villain nicknamed The Calculator (guest star Tom Amandes). Meanwhile, Nyssa (guest star Katrina Law) makes her move and Roy Harper (guest star Colton Haynes) returns to Star City.
Promo Video #1
See more at Arrow Season 4 Episode 12 "Unchained" Promo
Promo Video #2
Promo Video #3
See more at Arrow Season 4 - "Target" Trailer