Plot summary
Lois visits Francis at military school after he has a medical emergency, and quickly gets along well with the rest of the academy, upsetting Francis. Hal, no longer under Lois' supervision, quickly regresses into his rambunctious teenage persona, resuming his smoking, refusing to show up to work, and letting Reese and Dewey get away with everything. Malcolm and the "Krelboynes" decide to enter a killer robot competition, but Hal takes over the project and builds a dangerous robot complete with a bee cannon, to the point that the boys are forced to launch the bees onto him so he'll return to normal.
Credits
Adapted from Wikipedia contributors, Malcolm in the Middle season 1. HTML formatting and reference markers removed.