Arrow: Unfinished Business

"Unfinished Business" is the nineteenth episode of season one of the superhero action series Arrow. It was directed by Guy Bee with a teleplay written by Marc Guggenheim and Andrew Kreisberg, based on a story treatment by Kreisberg and Greg Berlanti. It first aired on the CW Network on Wednesday, April 3rd, 2013. In addition to the main cast, this episode also includes guest appearances by Colin Salmon as Walter Steele, Byron Mann as Yao Fei, Roger Cross as Lucas Hilton, Annie Ilonzeh as Joanna De La Vega, Eugene Lipinski as Alexi Leonov, and Tobias Slezak as James Holder.