Arrow season 6 episode 20 (S06E20) - Shifting Allegiances
Oliver turns to an old friend to help battle Diaz; Rene is out of the hospital but has a hard time readjusting to life as Wild Dog; Lance discovers something shocking about Black Siren. Arrow season Number: 6 episode Number: 20 episode Title: Shifting Allegiances Air Date: 2018-04-26
