E01 · Death Runs Wild 1h
9/17/1960
Story tells of a demented woman out to kill private eye Anthony George. The instrument of death, as it turned out, was, a wild stallion she stocked on her ranch. Her motive was revenge. On a previous case, the private eye had brought her lover to justice and the gas chamber.
E02 · Interrupted Honeymoon 1h
9/24/1960
E03 · The Cyanide Touch 1h
10/1/1960
E04 · Lady on the Brink 1h
10/15/1960
Checkmate comes to the aid of a woman with a traumatic past when it becomes evident that someone is trying to make it appear she's mentally unstable. discrediting her eye-witness testimony at a murder trial.
E05 · Face in the Window 1h
10/22/1960
E06 · Runaway 1h
10/29/1960
A girl shows up at Corey's apartment, claiming that she is running from someone who is trying to kill her. However, the detectives all find that nothing she has said checks out, including her numerous aliases, and that she's actually an heiress running from a controlling grandmother. But it does appear that the part about someone trying to kill her may be the truth.
E08 · The Deadly Shadow 1h
11/12/1960
E09 · The Dark Divide 1h
11/19/1960
Barbara Rush plays a dual role in The dark divide. Why should Margaret Russell's life be threatened? Her aunt keeps getting phone calls from a woman named Nikki Garnett, threatening Margaret. What motive could the woman have?
E11 · The Mask of Vengeance 1h
12/3/1960
E12 · The Murder Game 1h
12/17/1960
Attorney Emory Olivant invites Corey, Sills and Dr. Hyatt to a party. Once all the guests have arrived, Olivant announces that they are going to play a game—a murder game in which he will be the killer.
E13 · The Princess in the Tower 1h
12/31/1960
E14 · The Terror from the East 1h
1/7/1961
E15 · The Human Touch 1h
1/14/1961
Arguably the finest episode of the series, featuring guest star Peter Lorre as an ex-con criminal mastermind determined to wreak revenge on master criminologist Sebastian Cabot. An intricate series of cat and mouse moves between the two geniuses culminates in a surprise and ultimately poignant ending, befitting the episode title. This episode stresses the close friendships between the three detectives of CHECKMATE INCORPORATED as it contrasts with that of the brilliant, but soulless Lorre. Directing, writing and acting are all exemplary.
E16 · Hour of Execution 1h
1/21/1961
E17 · Don't Believe a Word She Says 1h
1/28/1961
E20 · A Matter of Conscience 1h
2/18/1961
E21 · Melody for Murder 1h
2/25/1961
E22 · Phantom Lover 1h
3/4/1961
A woman believes her husband has killed her male friend, who can not be found. She hires Checkmate to investigate.
E23 · The Gift 1h
3/11/1961
Lola Tuscany, a temperamental lady soprano, is having premonitions of her death. After her concert she is almost poisoned and Checkmate Inc. is hired to keep her safe. Don Corey is skeptical, believing it is a publicity stunt, until he is nearly killed when a bomb explodes in the car he and Lola are driving in.
E26 · Jungle Castle 1h
4/1/1961
After two attempts on his life, big game hunter Lee Tabor brings Dr. Hyatt and Carl to his home in the Malayan jungle. He asks for their help in finding out which of his three house guests is trying to kill him.
E27 · The Deadly Silence 1h
4/8/1961
E28 · Goodbye Griff 1h
4/15/1961
""Ex-convict Griff Nolan is jealous because his wife Libby earns more as a magazine editor than he does as a mechanic. More domestic strife develops when Griff becomes jealous of Libby's boss Lewis Bates --- and buys a gun.""
-- TV Guide
E32 · Death by Design 1h
5/20/1961
Eve Arden, plays a fashion designer, worried that someone is out to destroy her and her business. Checkmate have two main suspects.
E33 · The Thrill Seeker 1h
5/27/1961
E34 · Hot Wind in a Cold Town 1h
6/10/1961
E35 · A Slight Touch of Venom 1h
6/17/1961
