Lost in Space are to be cryogenically frozen for the voyage, and they are set to be unfrozen when the spacecraft approaches its destination. Meanwhile, Dr. Zachary Smith (Jonathan Harris), Alpha Control's doctor, is revealed to be a saboteur on behalf of an unnamed nation. After disposing of a guard who catches him on board the spacecraft, Smith reprograms the "Jupiter 2"s B-9 environmental control robot (voiced by Dick Tufeld) to destroy critical systems on the spaceship eight hours after launch. Smith, however, becomes trapped aboard at launch and his extra weight throws the "Jupiter 2" off course, causing it to encounter a
Lost in Space storm of asteroids. This, plus the robot's rampage, causes the ship to prematurely engage its hyperdrive, and causes the expedition to become hopelessly lost in the infinite depths of outer space. Smith's selfish actions and laziness frequently endanger the expedition; however, Smith's role assumes less sinister overtones in later parts of the series. The astronaut family of Dr. John Robinson, accompanied by a pilot and a robot, set out in the year 1997 from an overpopulated Earth in the spaceship "Jupiter 2" to travel to a planet circling the star Alpha Centauri. The "Jupiter 2" mission is sabotaged by Dr.