Callen Lennox

Callen Lennox was a companion of the Ninth Doctor. He had a pet dog called Doyle.

Callen met the Doctor on Solis Kailya when his mother was researching the planet's properties to revolutionise colony farming. They encountered the Vashta Nerada. (AUDIO: Red Darkness)

After travelling with the Doctor for a time, Callen and Doyle settled down on The Greenwood. ( AUDIO: The Green Gift)