Tom Welling Clark Kent Actor Allison Mack Chloe Sullivan Actor Erica Durance Lois Lane Actor Aaron Ashmore Jimmy Olsen Actor Justin Hartley Oliver Queen Actor Sam Witwer Davis Bloome Actor Cassidy Freeman Tess Mercer Actor Phil Morris John Jones Guest Star Alaina Huffman Dinah Lance, Black Canary Guest Star Alan Ritchson Arthur Curry Guest Star Ari Cohen Regan Matthews Guest Star Sara Canning Kat Guest Star Derek Lowe Sonar Technician Guest Star Patrick Gilmore Researcher Guest Star Alfred Gough Executive Producer Miles Millar Executive Producer Kevin Fair Director Brian Wayne Peterson Writer Kelly Souders Writer Todd Slavkin Writer Darren Swimmer Writer