The main cast of Smallville, including Tom Welling as Clark ... and would remain on the show through the middle of season 8.

in Smallville during its first season, before he joined as a main cast member from season two to eight. And to many fans' delight, he returned for a few appearances in the final season of the show.

After Smallville, Allison was cast in a recurring role in the second season of the sitcom Wilfred and guest-starred as a policewoman named Hilary in an episode of the thriller The Following.

But that doesn't mean the main cast got along with every guest star ... Michael Rosenbaum broke down what went down in episode 2 of season 4 of Smallville with his former co-stars, Tom Welling ...

At the start of the 21st century, Superman returned to television in the form of the hit prequel series Smallville ... later "the Red-Blue Blur" in Season 8, things took a darker turn during ...