"In the fourth season of the hit BBC sci-fi series, former runaway bride Donna Noble (Catherine Tate) joins the good Doctor (David Tennant) on his intergalactic adventures, fighting for justice and solving mysteries throughout space and time. The two battle psychic powers in ancient Pompeii, evil forces that lurk in an abandoned library and menacing alien wasps from the Silfrax Galaxy. Freema Agyeman also returns this season."