The Phantom Strikes (The Gaunt Stranger)

Crooked lawyer Maurice Meister's (Lawson) life is threatened by his ex-partner who is a master of disguise known as the Ringer. The police give him protection and place in his house the only man who can identify the Ringer - Sam Hackett (Hale) a small time crook. Despite the best efforts of Inspector Wembury (Barr), Dr Lomond (Knox) the police psychologist and Australian detective Inspector Bliss (Longden) Meister is murdered and the Ringer gets away.