Police try to track down a hooded serial killer who murders his victims with a combination of acid and poison gas.
Inspektor Higgins
Ann Portland
Betty Falks
Sir John
Keyston
Mark Denver
Harriet Foster
Secretary
Frank Keeney
Glenn Powers
1934
2022
2001
1998
1989
1993
1975
2007
1977
1976
2006
1986
1940
1992
1985
2018
1978
1973
1951
1961
1999
1969
1990
1980
2008
1996
2009
