SMALLVILLE Season 10 Episode 17 Kent Sneak Peek Clip : CLARK RETURNS TO THE ALTERNATE UNIVERSE AND RUNS INTO JONATHAN — Clark (Tom Welling) is shocked to find a mirror box in the barn. Clark Luthor surprises him and sends Clark Kent back to the alternate reality where Clark runs into a very angry Jonathan Kent (John Schneider). Meanwhile, back in our reality, Clark Luthor visits Tess (Cassidy Freeman) and tells if she doesn’t side with him he’ll kill her. Lois (Erica Durance) asks Emil (guest star Allesandro Juliani) to help her bring Clark back. Jeannot Szwarc directed with story by Genevieve Sparling and teleplay by Kelly Souders & Brian Peterson (#3X6018).