Paul Langer

Paul Langer was the ex-husband of Carla Langer, and father to Sarah Jane Smith's young friend and ally Clyde.

Biography
Paul and Carla fell out of love when Clyde was younger, and Paul ran off with her sister Melba. He came to live in Germany. Paul ran again, returning to Clyde's life, when Melba became pregnant. Clyde showed him the attic in Sarah Jane's home and explained to him that in his free time, he helped to save the world. Paul then stole a Berserker Pendant which made him go insane going on a rampage through the city before Sarah Jane, Clyde, and the gang made him take off the pendant returning him back to his normal self. (SJA: The Mark of the Berserker)