High Quality Content by WIKIPEDIA articles! Tempest is the twenty-first episode and season finale of the first season of the WB original series Smallville. The episode originally aired on May 21, 2002; Philip Levens and Alfred Gough wrote the script, and Greg Beeman directed. In the episode`s narrative, Lex attempts to forge his own destiny away from LuthorCorp; Whitney leaves Smallville for the Marines; Roger Nixon discovers Clark`s secret and attempts to expose him to the world; and Lana is sucked into a tornado.