Laurence Scarman was a scientist, and brother of Marcus Scarman.
He lived in a small English village, at the lodge of his family home, in 1911 and invented a primitive radio telescope, which he referred to as a Marconiscope. After encountering the Fourth Doctor and Sarah Jane he got involved with the Doctor's battle against Sutekh, who had reanimated the corpse of his brother, and even travelled briefly in the Doctor's TARDIS. He originally refused to accept that Marcus was dead and tried to prevent the Doctor's attempt to break Sutekh's control. Later, he tried to reason with Marcus and remind him of his past. Although he seemed at first to be getting through to the real Marcus, the conditioning was too strong. Marcus interrogated and then strangled Laurence. (TV: Pyramids of Mars)