Smallville - Luthor - Season 10 - Episode 10 - CW

This episode introduces Clark to alternate universes. In this one, Clark is transported to the world where he's been raised by Lionel Luthor . . rather than the Kent's, and he's taken on the persona of Ultra-man. He's a very evil and power hungry man on this world. Anyways, Tess is bequeathed a Kryptonian relic . . the mirror-box, by her estranged father, Lionel. Clark finds it, while at Cadmus looking into the Lex clone that's on the loose. When he activates it the two Clarks switch places. On the other Earth he finds out about Tess being Luthor's daughter, and that this other Clark had held this world in a grip of fear. Fearing for his own world, he tries to find the way back. Of course he does, and all is put right. But I think the real purpose of this story was to work Lionel back into the mix of things. When Clark does finally find the other world's mirror-box, with Ollie's help, he comes back but . . Lionel is close by. Somehow Clark doesn't know it, but Lionel has also come back to his Earth with him . . on his heels, or coat-tails. And it looks like he's decided to lay low and get the feel for this Earth before he makes any big moves. This also resolves all the secrets that Tess has been hiding. Her and Clark talk about Alexander, and her being the bastard child of Lionel. So far it seems like Clark trusts her. But it's probably tenuous at best. And . . they haven't told everybody else yet. I'm sure there will be some dissenting opinion. I think this is shaping up to be a great season. I can't wait to see how it all shakes out.