Orbital missile

From Tardis Wiki, the free Doctor Who reference

Orbital missiles were weapons used by the Department to repel alien invasions. As their name suggests, they were intended to destroy spacecraft of alien invaders that entered orbit of Earth. When an Anubian spacecraft entered orbit, Inspector Drake ordered it destroyed with orbital missiles. June Turner protested, saying that it could be merely a meteor. The ship cloaked and it was assumed it had burnt up in the atmosphere. (TV: Curse of Anubis)