Elflike creatures found in the Pass Christian saucer, controlled by puppet masters. They were assumed to be natives of Titan. All died when the saucer was ruptured and their atmosphere escaped.
Asiatic Plague
Plague broke out in Russia and China probably as a result of the puppet masters' unconcern about human needs, particularly hygiene.
U.N.S. Avenger
Ship that transported an armed force from Earth to Titan to wipe out the puppet masters.
Powerman second class in the tank that attacked the Pass Christian saucer. She held the air lock open so that the puppet masters could be destroyed, and died in the assault.
Alias used by the female Section agent who accompanied Andrew Nivens to investigate the flying saucer landing. Afterwards, she apparently adopted the name permanently, using it when she married Sam Cavanaugh. She was born into the Whitmanites (her original name was Allucquere) and emigrated to Venus with her family, where the entire community had been taken over by puppet masters and mostly kept in suspended animation until needed as hosts; Mary spent ten years suspended. The puppet masters, and all human hosts except Mary, died in an epidemic of nine-day fever. Mary was found by Venus colonials and adopted into a mining colony. Her recollection of these events under hypnosis provided a means to destroy the infestation of puppet masters on Earth.
Sam Cavanaugh (a.k.a. Elihu Nivens)
Alias for an agent of a top-secret U.S. government agency called the Section. He was assigned to investigate reports of a flying saucer landing in Grinnell, Iowa. With Mary Cavanaugh and Andrew Nivens (his boss and his father), he discovered that the saucer was real,and that it had brought intelligent parasites to Earth to take over the population. Although briefly taken over by a puppet master himself, he played a major role in defeating the invasion. He seldom used his real name, Elihu Nivens, during the mission, preferring the alias that he adopted when he first visited the saucer landing site.
Dr. Chamleigh (no first name)
Nonsectarian minister who performed marriages with "fertility rites and everything, but with dignity." Sam Cavanaugh and Mary Cavanaugh declined his services.
Constitution Club
The membership "read like Who's Who in Finance, Government, and Industry." Sam Cavanaugh infected a member with a puppet master and with his aid infiltrated the Club to "recruit" more members.
Mark Cummings
Junior Congressional Whip, whom the President had to order to remove his shirt during a session of Congress to comply with Schedule Bareback.
Communications officer at armed forces Supreme Headquarters during the offensive against the puppet masters.
Myrtle Doolightly, Ph.D.
[mentioned in passing] Stereo broadcast lecturer on "Why Husbands Grow Bored.", sponsored by Uth-a-gen Hormone Company. Sam Cavanaugh encountered the program while looking for a news broadcast that might give some clue about conditions in Zone Red (the area infested by puppet masters).
Dotty
Section agent and member of the clerical pool, who was in the headquarters when the puppet master got loose.
The Entropy of Joy
[mentioned in passing] Book written by the prophet of the Whitmanites.
Charity Evans
Congresswoman from Maine. Her response to Schedule Bareback was to wear a low-backed evening gown.
One of the people present at Mary Cavanaugh's hypnotic sessions.
Senator Gottlieb
(no first name) A member of the President's political party, he tried to propose impeachment during the hearing on the puppet masters. He was revealed as a puppet master host.
Graves (no first name)
Researcher in charge of the Section's biology lab, and thus head of the puppet master research.
M. C. Greenberg (no full first name)
Real estate agent who rented a loft to Sam Cavanaugh. Sam infected him with a puppet master and recruited him to help infect others.
Chimpanzee used as a puppet master host by Section researchers. She learned to pick locks and transmitted puppet masters to gibbons in neighboring cages.
"If You Mean What I Think You Mean, What Are We Waiting For?"
[mentioned in passing] Song Sam Cavanaugh encountered on the stereo while searching for a newscast from Zone Red.
Jake (no last name)
Washroom attendant at the Constitution Club, whom Sam Cavanaugh infected with a puppet master. He died because "his master would not let him take time out for necessities."
Also known as Old John, a hermit in the Adirondacks where Sam Cavanaugh had his cabin. He was possibly the source of the puppet master that infected Sam's cat.
Newspaper that Sam Cavanaugh purchased to check the status of the city (in Zone Red). It made no reference to Schedule Bareback, but did have a headline explaining the disruption of long-distance phone service.
Maurice T. Kaufman
Vigilante who pulled a gun on a "hagridden" police officer in Albany, New York; the officer killed him.
B. J. Kelly (no other first name)
Security officer in the Section's headquarters, "the greatest scientific criminologist" of his time.
Kwikfede
[mentioned in passing] Restaurant chain, either fast food or an automat.
[mentioned in passing] Program that Sam Cavanaugh encountered while searching the stereo from newscasts from Zone Red.
MacArthur Station
Location of a washroom booth through which the Section offices could be reached.
Malcom MacDonald
Police sergeant who was controlled by a puppet master. When he was challenged by a vigilante, he killed the man but was torn to pieces by a mob, along with his puppet master.
Malone
"Mr. Malone wants this car-immediately" is Section code for "destroy the evidence", in this case the car that "the Cavanaughs" drove to Des Moines to check the flying saucer reports.
Secretary of Security in the Unites States Cabinet.
McDonough (no first name)
Assistant to the United States President, who acted as a buffer between him and people trying to reach him.
Dr. McIlvaine (no first name)
Comparative psychologist with the Smithsonian Institution, author of Mars, Venus, and Earth: A Study in Motivating Purposes. He was involved in the puppet master research.
George and Vincent McLain
Farmboys who were blamed for the "hoax" after the flying saucer landing, and who acted as tour guides for the fake saucer that Sam and Mary Cavanaugh investigated. They were almost certainly puppet master hosts.
Mercy Hospital
Hospital to which Davidson was sent to have his wounded arm amputated and replaced with a graft.
Apparently the site of the new Section headquarters after the puppet masters learned the old location; it was itself infested with puppet masters. (By implication, the original city of Philadelphia was destroyed during an atomic war.)
A Venerian disease fatal to nearly all humans, but even more quickly fatal to puppet masters. It was used to destroy the puppet masters after a cure was developed for humans.
Andrew Nivens
The head of the Section. (This name is never used explicitly in the book, but the President calls him "Andrew", and his son's real surname is Nivens.) He used the alias "Charles M. Cavanaugh" while investigating the saucer landing, and is usually called simply "the Old Man" by his employees.
Amoeba-like extraterrestrial parasites that invaded Earth to use humans as their hosts, completely controlling mind and body. After the Earth infestations were destroyed by infecting infested regions with nine-day fever, they were traced to Titan, and an expedition sent to wipe them out.
Rare Stamps and Coins
Hole-in-the-wall shop through which the Section offices could be reached.
Location of a launch platform, presumably in the Washington, D.C., area.
Ronald (no last name)
Lounge steward in the Section headquarters, who was on the premises when the puppet master got loose.
Roscoe & Dillard
Jobbers and manufacturers agents in Des Moines. Sam Cavanaugh sent a message to them while hagridden, apparently to have more puppet masters shipped to Washington D.C.
Ape introduced into a puppet master-infested chimp group to satisfy the scientists' curiosity about how the puppet masters multiplied. He was used as a test case for nine-day fever as a weapon against the invaders.
Schedule Bareback
First phase of Operation Parasite. It required everyone to stay exposed to the waist to ensure that they were free of puppet master control.
Schedule Counter Blast
Offensive against the puppet masters that involved taking over all news media in infested areas. The infestation was much greater than suspected, and the plan failed completely.
Schedule Fever
Operation to infect people in areas infested by puppet masters with nine-day fever, hoping the kill the parasites and administer the antidote before the disease killed the human hosts.
While Schedule Bare Back was in effect in Zone Green, a fake air-raid made it possible for puppet master hosts to "recruit" fellow air-raid shelter occupants, and general chaos resulted.
Seagraves Expedition
[mentioned in passing] Space expedition that disappeared en route to the Jovian moons.
Scientific research mission that took place some time before the puppet masters invaded Earth.
Section
Quasi-governmental intelligence organization for which Sam Cavanaugh worked. It acted in the forefront of the battle against the puppet master invasion.
One of two police officers who stopped Sam Cavanaugh and Mary Cavanaugh after they returned from their "vacation", and stripped them to search for puppet masters. They provided a car to take Sam and Mary to their destination because of the bandages on Mary's back.
Anarchist-pacifist sect evicted from Canada; their settlement failed in Little America, and the survivors emigrated to Venus. They used an artificial language, even for personal names. The Venus colony was infested with puppet masters; both masters and hosts died in an epidemic of nine-day fever; Mary Cavanaugh (Allucquere) was the only survivor.
"Why Husbands Grow Bored"
Stereo lecture encountered by Sam Cavanaugh while looking for a newscast that would give some clue to conditions in Zone Red.
World War III
[mentioned in passing] It occurred before the invasion of the puppet masters.