Reagan Dale Neis

Malcolm tries not speaking his mind; Hal takes up race-walking; Reese goes on a date with his girlfriend... and Craig.

Malcolm sneaks around to date a girl whose father hates him; Hal and Lois become more productive when they can't have sex for a week; Dewey discovers he's an "evil twin"; Francis mediates a dispute between Otto and his cowboy neighbors.

Hal (Bryan Cranston) accidentally derails a train carrying toxic waste, forcing the townspeople to evacuate. With Frankie Muniz and Jane Kaczmarek.

When Hal kicks Malcolm out of the house for misbehaving, Reese tries to take advantage of Hal's distraction to come up with a truly bad stunt of his own, and Francis takes offense when Otto's musician nephew plays a musical accompaniment to Francis' every move.

Lois uses a long drive with Malcolm to further his sex education; Reese spends a day in prison; Dewey plants seeds of discontent in Hal's vocal group; Francis has an accident branding Otto's favorite cow.