The May 1 episode of Arrow, which is called “The Undertaking,” looks at a time before the accident that left Oliver on the island. It features the return of Colin Salmon as Walter, Jamey Sheridan as Oliver’s father Robert Queen…. and look, there’s John Barrowman as Malcolm Merlyn, too.
There are also some nice promo shots of Stephen Amell, Susanna Thompson, and Katie Cassidy within.
Check out these pics from Episode 21 below, and as always, find more Arrow spoilers at our Arrow Spoilers Page.