Chad Donella

Without revealing his superpowers, Clark tries to save Lana from becoming the prey of a buggy classmate infected by kryptonite insects, and Lex ponders what to do with Lana's strange kryptonite necklace.

Gibbs interrogates a convict that is about to be executed in order to find out where he hid his victims, but when the plan doesn't work out, the team must solve the case in its own way.

In the 200th episode, Clark and Lois return to Smallville for their high school reunion. Later, Brainiac 5.0 shows Clark his past, present and future, revealing what actually happened the night Jonathan died.

Andy and Chris face a hard decision while investigating a nightclub beating when evidence suggests a cop is the likely perpetrator. Meanwhile, the senior officers compete in a retraining exercise led by new acting sergeant Frank Best.