Mark Gibbon

An edgy janitor takes Clark's high school class hostage at LuthorCorp, claiming his jitters were caused by a mysterious contaminant.

Clark tests the limits of his powers in order to save his young telepathic friend Ryan from an evil doctor who wants to control the boy's abilities; Aunt Nell leaves Smallville; Lex has a run-in with the mayor.

Clark is unsettled when a class project has Chloe delving into his past; Lex has problems of his own, when a man he thought long dead turns up seeking vengeance.

Former DA Raymond Sacks threatens Lois after he is released from prison; Chloe discovers Zod's secret.

Emma talks Mary Margaret into reading to an unidentified coma patient in the hospital; Prince Charming and Snow White meet for the first time.

The boss of a major corporation is kidnapped and Kagame puts the victim's fate in the hands of the public, with an Internet poll determining whether she should be freed or killed.