Venus II

Venus II (alternatively styled Venus 2) was a rocket on Professor Logan's space project to Venus. When the Third Doctor found out that Logan had been lying to the government he, with two astronauts restrained him inside and launched. It was on a collision course for Venus but the Doctor managed to escape and reprogram it to collide with the Logan family castle. Faced with the prospect of it being destroyed, Logan promised to write a full confession and redirected the rocket to land elsewhere. (COMIC: Doctor Who and the Rocks)