Season 1
Episode: S01 Special | Airdate: Apr 25, 1978 (90 min)
Las Vegas private eye Dan Tanna probes the murder of Marilyn Ochs, a teenage prostitute who ran away from home because she didn't get along well with her new step-father Merle.
Episode: 1x01 | Airdate: Sep 20, 1978
Blackmailers drug a model and then take pornographic photos of her in order to force her to sign a management contract.
Episode: 1x02 | Airdate: Sep 27, 1978
Dan is asked to find three women who lured a politician to a hotel in order to take compromising photos.
Episode: 1x03 | Airdate: Oct 11, 1978
Dan suspects a greedy land speculator when wild animals, murder attempts and thugs beset Mother Mishkin.
Episode: 1x04 | Airdate: Oct 18, 1978
The top suspects in the death of a reformed prostitute include three former loves: a folk singer, a tennis star and a construction tycoon.
Episode: 1x05 | Airdate: Oct 25, 1978
A woman hires Dan to find her supposedly dead father, whom she thinks she saw in the back of the church during her wedding.
Episode: 1x06 | Airdate: Nov 1, 1978
A glittering jewelry convention at the Desert Inn attracts many buyers and sellers to the dazzling array of pricey gems... as well as some cunning thieves who plan to rob a wealthy Sheik of his collection of valuable rubies. When Tanna gets drawn into the case, he encounters a seductive woman who may be involved in the caper.
Episode: 1x07 | Airdate: Nov 8, 1978
Cocaine smuggler Marty Trafalgar tries to retire, but his former partner Wendell Milliken from Miami won't allow him to do so.
Episode: 1x08 | Airdate: Nov 15, 1978
A serial rapist appears to be targeting contestants of the "Miss Casino" beauty pageant. A description of the suspect is of some help, but with the attacker still loose, Tanna reluctantly allows his assistant Bea to act as bait to try to nab the assailant.
Episode: 1x09 | Airdate: Nov 22, 1978
Dan steps in when a white slavery ring run by a wealthy man kidnaps several chorus girls.
Episode: 1x10 | Airdate: Dec 6, 1978
Faded singer Ginny Gordon's comeback is threatened, and her sanity imperiled, by attempts on her life. Is her former partner responsible for the attempts, or is a recent acquaintance terrorizing her?
Episode: 1x11 | Airdate: Dec 20, 1978
A tennis star is threatened with possibly fatal injury unless he loses an upcoming $100,000 match.
Episode: 1x12 | Airdate: Jan 10, 1979
A police officer teams with Dan to nab a killer recreating the 19th century murders of prostitutes by "Jack the Ripper."
Episode: 1x13 | Airdate: Jan 17, 1979
A wheelchair bound, former Olympic athlete offers to pay ransom when his singer friend is kidnapped
Episode: 1x14 | Airdate: Jan 24, 1979
A crippled Vietnam veteran hires two mercenaries to take his revenge against Dan, whom he blames for his wartime injury.
Episode: 1x15 | Airdate: Jan 31, 1979
Dan suspects an Indian chief's death may be linked to a real estate mogul's attempts to buy up Indian land.
Episode: 1x16 | Airdate: Feb 7, 1979
Dan gets a surprise visit from his childhood best friend, unaware that he's grown up to be a hit man who has a contract to carry out in Las Vegas.
Episode: 1x17 | Airdate: Feb 14, 1979
Dan's surprised to learn that a high school guidance counselor is part of a ring leading teenage girls into prostitution.
Episode: 1x18 | Airdate: Feb 28, 1979
Dan searches for a mysterious killer who attacks women he's involved with.
Episode: 1x19 | Airdate: Mar 7, 1979
Binzer vows to track down the killer who murdered his girlfriend.
Episode: 1x20 | Airdate: Mar 14, 1979
A distraught newlywed hires Dan to find her missing husband, who disappeared shortly after they had gotten into a minor traffic accident with a Government vehicle.
Episode: 1x21 | Airdate: May 2, 1979
Dan can't seem to convince an old friend, a beautiful motorcycle daredevil, that the accidents befalling her are really attempts on her life.
Episode: 1x22 | Airdate: May 9, 1979
Dan must protect a Middle Eastern princess from fanatics who disapprove of the government she represents.
Season 2
Episode: 2x01 | Airdate: Sep 19, 1979
Dan attempts to clear his good friend Harlon Twoleaf of a murder charge.
Episode: 2x02 | Airdate: Sep 26, 1979
Dan traces Roth's steps to learn why he turned over his business to another man and then disappeared.
Episode: 2x03 | Airdate: Oct 3, 1979
Dan helps a young nun who's arrived in Las Vegas seeking a stolen religious artifact.
Episode: 2x04 | Airdate: Oct 24, 1979
A wealthy Kentucky rancher hires Dan to track down a pregnant, runaway teenager whom he claims is his daughter.
Episode: 2x05 | Airdate: Oct 31, 1979
Jewel thieves try to divert police by terrorizing a designer and her models.
Episode: 2x06 | Airdate: Nov 14, 1979
Dan comes to the aid of a popular singer who's being stalked by a man who attacked her once before.
Episode: 2x07 | Airdate: Nov 21, 1979
A vengeful convict gives Dan a dose of toxic venom, leaving the detective 20 hours to locate a cure.
Episode: 2x08 | Airdate: Nov 28, 1979
A feminist denies murdering a pimp, despite overwhelming evidence.
Episode: 2x09 | Airdate: Dec 12, 1979
Dan is hired to find the source of counterfeit chips which caused an overage of $2 million in the Roth casinos.
Episode: 2x10 | Airdate: Dec 19, 1979
Dan discovers that an old friend, an auto racer, is involved in smuggling drugs in the bodies of classic cars.
Episode: 2x11 | Airdate: Jan 2, 1980
Dan looks into the suspicious deaths of two fellow private investigators who are in town for a convention.
Episode: 2x12 | Airdate: Jan 9, 1980
A hypnotist involves unsuspecting Binzer in a plot to murder a basketball player and a sportswriter.
Episode: 2x13 | Airdate: Jan 16, 1980
Dan suspects vengeful veterans when a bomb similar to ones used in Vietnam kills the wife of an old war buddy now performing in Las Vegas.
Note: Will Sampson appears in this episode but only in flashbacks from the pilot.
Episode: 2x14 | Airdate: Jan 23, 1980
Dan suspects that Beatrice's fiancé may actually be more interested in the $2 million a wealthy uncle left to Bea's daughter.
Episode: 2x15 | Airdate: Jan 30, 1980
Costigian gets kidnapped and two beautiful magicians who are involved in the kidnapping wind up dead, leading Dan to a ruthless man for whom the detective has evidence that would cause the Gaming Commission to deny him a casino license.
Episode: 2x16 | Airdate: Feb 6, 1980
A trio of beauties become suspiciously good at the baccarat table.
Episode: 2x17 | Airdate: Feb 27, 1980
A slain prostitute is found in Dan's car while a group of investors, including Dan's brother-in-law, meet to buy a casino.
Episode: 2x18 | Airdate: Mar 5, 1980
When someone with a grudge against Nelson goes after his family, he tries to handle it on his own. But Dan insists on helping.
Episode: 2x19 | Airdate: Mar 12, 1980
Dan searches for a mysterious stalker who's after a famous female impersonator.
Episode: 2x20 | Airdate: Mar 19, 1980 (120 min)
The search for an old friend's killer leads Dan to San Francisco, where he teams up with two beautiful policewomen.
Episode: 2x21 | Airdate: Apr 30, 1980
Beatrice and some showgirls are held captive by convicts demanding $5 million for their release.
Episode: 2x22 | Airdate: May 7, 1980
The mysterious death of a restaurateur convinces his family they're the targets of a vendetta.
Season 3
Episode: 3x01 | Airdate: Nov 5, 1980
Dan is kidnapped while jogging and taken to Hawaii, where a crime syndicate orders him to murder Roth. Part one of two.
Episode: 3x02 | Airdate: Nov 5, 1980
Conclusion. Dan stages Roth's murder with a lookalike, then sets out to hunt down the leader of the conspiracy.
Episode: 3x03 | Airdate: Nov 12, 1980
After Beatrice is shot while in her apartment, Dan links the attack to a killer who has already slain three other people.
Episode: 3x04 | Airdate: Nov 19, 1980
Dan's private eye license, and possibly his freedom, are in jeopardy unless he can prove that he shot and killed a young man in self defense.
Episode: 3x05 | Airdate: Nov 26, 1980
Dan is horrified to discover that his new girlfriend has a double life as one of the Strip's highest paid hookers and that her life is in danger.
Episode: 3x06 | Airdate: Dec 3, 1980
A bag lady turns to Dan for help when she can't convince anyone that her friend didn't die accidentally, but was murdered.
Episode: 3x07 | Airdate: Dec 10, 1980
A nun claims to hold the deed to the land on which the Desert Inn stands.
Episode: 3x08 | Airdate: Dec 17, 1980
Dan cuts his ski vacation short upon meeting a young girl who claims to be his daughter, and he must help her find her mother, a distraught old flame of Dan's who's out to kill herself.
Episode: 3x09 | Airdate: Jan 7, 1981
A drug dealer plans to hook Dan on narcotics.
Episode: 3x10 | Airdate: Jan 14, 1981
Dan helps an old friend in trouble, a prospector who found a fortune in money in the desert and now has thugs chasing him for it.
Episode: 3x11 | Airdate: Jan 21, 1981
While flying in a small airplane over the city, Bea claims to have witnessed a murder, yet no body or evidence of a crime can be found.
Episode: 3x12 | Airdate: Feb 18, 1981
A mother hires Dan to find out why her grown daughter goes out at night dressed like a teenager.
Episode: 3x13 | Airdate: Feb 25, 1981
Dan assembles a gang to pull off a fake robbery to test Roth's security system, but the gang decides to make it a real robbery.
Episode: 3x14 | Airdate: Mar 4, 1981
A rape victim hires Dan to find her attacker, and he is led to a man she dated, who may be a serial rapist.
Episode: 3x15 | Airdate: Mar 11, 1981
Two men from Binzer's past return and demand that he pay them $50,000, sending Binzer on a panicked search for someone to lend him the money.
Episode: 3x16 | Airdate: Mar 18, 1981
Dan's investigation of a mobster abruptly ends when Tanna is temporarily blinded after being shot in the head by thugs.
Episode: 3x17 | Airdate: Mar 25, 1981
A porno movie producer tries to take Lt. Nelson off the streets by framing him for murder.
Episode: 3x18 | Airdate: Apr 15, 1981
Ten persons are gunned down in a restaurant, and Dan is hired by a victim's widow to find the killers.
Episode: 3x19 | Airdate: Apr 22, 1981
Dan helps prevent the murder of a defector who piloted a secret plane to the U.S.
Episode: 3x20 | Airdate: Apr 29, 1981
Dan comes to the aid of Wayne Newton when the famed entertainer is threatened by a psychotic who claims that he's the real Wayne Newton and that Wayne is an impostor.
Episode: 3x21 | Airdate: May 6, 1981
Dan's detective idol asks for help in solving the murder of a woman he followed from Paris to Las Vegas.
Episode: 3x22 | Airdate: Jun 3, 1981
Dan is reluctant to work with a psychic to locate a couple's daughter, kidnapped for a ransom of $2 million in diamonds.
Episode: 3x23 | Airdate: Jun 10, 1981
Someone posing as Dan has set himself up as a one man judge and jury to kill criminals released on technicalities.