Special Guest Stars David Ramsey as John Diggle Guest Stars Nathan Owens as Ocean Gracyn Shinyei as Young Kate Jesse Hutch as Agent Russel Tavaroff Peter Outerbridge as Roman Sionis Ava Sleeth as Young Beth Shivaani Ghai as Safiyah Sohail Wallis Day as Circe Sionis Leah Gibson as Tatiana / The Whisper Co Starring Allison Riley as Dana Dewitt Gardiner Millar as GCPD Captain Arpad Balogh as Man