Sally Colt/Corbett makes a final appearance in "The Mother Hunt", in which Archie again remarks that Sally and Dol had made him change his attitude about female detectives. Sally Corbett is played by Manon von Gerkan in "Motherhunt", part of the second season of the A&E original series "A Nero Wolfe Mystery" (2001–2002). Wolfe generally only called on these operatives in cases where manpower beyond the three 'teers was needed, or when one of the 'teers was unavailable, or when certain specialized talents were required. Arnold Zeck appears in three Nero Wolfe novels. Zeck is a mysterious and powerful crime boss possessed of a superior intellect. He and Wolfe become mutual admirers and antagonists in the course of several cases; when he is first mentioned in "And Be a Villain", Archie indicates that he became aware of Zeck following a telephone call to Wolfe made several months before the events of the novel during an unreported case, but Wolfe has warned him not to investigate any further and to do his best to forget that the criminal exists. Wolfe summarises his activities and tactics in "The Second Confession" (1949) as follows: "He has varied and extensive sources of income. All of them are illegal and some of them are morally repulsive. Narcotics, smuggling, industrial and commercial rackets, gambling, waterfront blackguardism, professional larceny, blackmailing, political malfeasance – that by no means exhausts his curriculum, but it sufficiently indicates his character. He has, up to now, triumphantly kept himself invulnerable by having the perspicacity to see that a criminal practising on a large scale over a wide area and a long period of time can get impunity only by maintaining a gap between his person and his crimes which cannot be bridged; and by having unexcelled talent, a remorseless purpose and a will that cannot be dented or deflected." Wolfe considers Zeck the most dangerous criminal he has encountered in his career and informs Archie that any direct conflict between them would by necessity become a battle to the death, intimating that he would be compelled to abandon the brownstone and work to destroy Zeck utterly if such circumstances arose. Zeck’s malevolent presence intrudes via telephone in two novels, "And Be a Villain" (1948) and "The Second Confession" (1949). In the latter, he sends gunmen to fire on Wolfe's orchid rooms in an attempt to dissuade Wolfe from investigating a case that could lead back to him.