Astor agrees to have a deadly brain implant removed; a distraught Westlake must focus on saving a kidnapping victim.
A Japanese detective in town to extradite an assassin goes head to head with an international crime boss.
A series of deaths links to an old case, but someone does not want Astor and Westlake (James McCaffrey, Heather Medway) to reopen it.
Astor and Westlake (James McCaffrey, Heather Medway) must protect a spiritual ruler from a fated encounter with an assassin.
A sophisticated gun developed by the U.S. government is stolen and used in a murder.
A computer disk containing the formula for a popular soft drink is stolen and held for ransom.
Two bank robbers take Astor and a bystander hostage.
An aristocratic con man plots to steal a precious necklace.
Astor and Westlake pretend to be married to infiltrate a ring of diamond thieves.
A terrorist who was paralyzed in a battle with Westlake comes back for revenge.
After Catlett reads his brother's latest novel, fact becomes stranger than fiction as the plot line becomes real.
While staking out robbery suspects, Westlake (Heather Medway) finds out Astor (James McCaffrey) isn't the man she thought he was. Guest star: Rachel Hayward.
Astor and Westlake try to locate a stolen cache of diamonds before some dangerous criminals take possession of them.
An apparent terrorist bombing camouflages an elaborate plot for an heir to claim her father's million-dollar pension.
A former Israeli spy's (guest star Michael Fairman) new life is threatened when arms dealers kidnap his wife (guest star Jo Bates). With Heather Medway and James McCaffrey.
Frankie becomes a stripper to expose a nightclub extortion racket.
Astor and Westlake encounter a ruthless bounty hunter while trying to exonerate a man accused of murder.
Astor falls in love with the wife of a Colombian drug lord while investigating the Blanca Noche cartel.
Astor (James McCaffrey) infiltrates a security-tight mafia conference; a labor negotiator tries to seduce Westlake (Heather Medway).
A small-time con artist helps Astor and Westlake catch a money launderer in an elaborate sting operation.
Joe Astor returns to drive the new Viper when Thomas Cole is reassigned after blowing up the old Viper.
Notorious criminal Giles Seton (Peter Wingfield) masterminds a plot to create a Cole (Jeff Kaake) look-alike to steal the Defender.
After an undercover assignment goes awry, Westlake is abducted by mercenaries bent on detonating a bomb -- with her help.
Followed by assassins, Westlake's photojournalist ex-husband arrives with news that their divorce was never finalized.
Cole (Jeff Kaake) returns to his hometown to help his father (guest star Robert Fuller) solve a mystery when the local police chief dies.
A computer disk becomes the key to catching a corrupt federal marshal. With Jeff Kaake and Heather Medway.
Catlett and Westlake (J. Downing, Heather Medway) pose as husband-and-wife burglars in order to catch an arms dealer.
While investigating a mass suicide, the team (Jeff Kaake, Heather Medway, Joe Nipote) stumbles upon a government coverup.
After an attempt on Catlett's (J. Downing) life, Cole and Frankie (Jeff Kaake, Joe Nipote) must find the insider responsible.
An armored car with $1 million in ones is stolen, and Cole's girlfriend is a prime suspect.
An ex-con turned tabloid news reporter (Ian Tracey) gets mixed up in Cole's (Jeff Kaake) investigation of an arms dealer.
A crime lord's murder threatens to reveal government corruption. Guest stars: Stella Stevens and Clarence Clemons.
Cole and Westlake (Jeff Kaake, Heather Medway) desperately search for an escaped convict (guest star Nicole Prescott) who is carrying a deadly virus.
Westlake's (Heather Medway) second job as a wilderness guide turns deadly when she is kidnapped by armed men.
Cole's niece must live with the consequences of a fatal drunken driving accident; Frankie, Catlett and Cole uncover a drug ring at a local club.
Cole goes under cover at a health club frequented by the beautiful wives of gangsters in order to solve the murder of one woman's husband.
Westlake's mother (Priscilla Barnes) falls for a mysterious secret agent (Robert Culp).
A fully equipped motorcycle and rider (guest star John Haymes Newton) threaten the future of the team. With Jeff Kaake and Heather Medway.
When Cole discovers an old CIA buddy living on the streets, he's again led into a world of espionage and intrigue.
Westlake and Cole investigate several arson crimes and stumble upon an elaborate plot which incriminates someone close to them.
While investigating her best friend's husband (Garwin Sanford), Westlake (Heather Medway) falls for his partner-in-crime.
An international assassin seeks revenge after Detective Westlake kills her lover in a prison breakout.
Cole is placed in jeopardy when he is persuaded to help Catlett catch an illegal arms dealer; the team learns it has a new partner.
After faking his own death, Cole attempts to bring down the Massey crime family by infiltrating its ranks.
The Viper team investigates the death of a software designer whose development of a new computer technology cost him his life.
An autistic savant's life is in danger when he witnesses his brother's mob-related death and memorizes other incriminating evidence wanted by the killers.
A dangerous criminal escapes from a cryogenic prison and takes hostage a former cohort who betrayed him.
An FBI agent assigned to the Viper team is accused of stealing a weapon that causes spontaneous human combustion.
A politician, a mysterious young woman and a movie star's long-ago suicide link to the death of an investigative reporter.
Equipped with an exact replica of the Defender and a canister of a deadly nuclear substance, a criminal wreaks havoc in Metro City and causes the Viper Project's termination.
Cole's former mentor escapes from prison, robs a Chinese artifact exhibit and gives the Viper team a tough chase with his own supercharged vehicle.
Revolutionaries use a drugged scientist to steal nerve gas which they plan to unleash against a cabinet member.
While investigating the murder of an 18-year-old gang leader, the Viper team uncovers a plot involving a crime syndicate hoping to expand its territory.
When a scientist is transformed into a cyborg, he becomes a killing machine preying upon anyone in his path -- including his own wife.
A teenage boy (Seth Peterson) helps a muscle-car gang steal a new type of rocket fuel developed by his father. With Jeff Kaake.
Thieves specializing in selling high-tech weapons to terrorists make the Defender their next target. With Jeff Kaake.
After Allie traces the theft of a high-tech satellite system to various suspects frequenting a casino, the Viper team must track down the true thieves.
An 11-year-old boy witnesses a murder, and Cole must protect the child and his mother from the killers until he can testify against them.
A beautiful thief robs a platinum reserve after she escapes the Viper team's custody with the help of her boyfriend, an explosives expert.
Hot on the trail of a stolen military weapon, Cole and a seriously wounded Westlake become trapped in an abandoned petroleum refinery.
Cole, Westlake and Frankie go under cover to nab a corrupt federal agent who is heading up a burglary ring.
Cole and the team attempt to protect a radio talk show host from a mob boss angered by murder accusations made against him.
Cole and the team track down the corrupt police officers responsible for the deaths of undercover cops.
Allie becomes ensnared in an illicit arms-dealing operation involving the theft of a new fighter plane.
Police officer Cameron Westlake joins the Viper team and helps them nab a bank robber who travels in an armored tractor-trailer.
A visiting dignitary is targeted by the assassin who killed her father; Frankie is attracted to a royal attendant.
Astor battles a vengeful former adversary who steals an artificial heart and places a dying young girl in danger.
Astor helps a female police officer accused by a news reporter of being a vigilante who is killing members of the Outfit.
Astor meets a woman who claims to be his wife while he is investigating the Outfit's kidnapping of a teenage boy.
A brilliant automotive designer is kidnapped when her invention threatens to put a petroleum executive's shady company out of business.
A former hitman takes on Astor's physical identity to carry out a hit in order to free his innocent girlfriend from the Outfit.
Astor, Wilkes and Frankie must pool their resources when Frankie's friend is brainwashed into helping the Outfit get hold of a genetic shipment.
Astor matches the Viper's defenses against an equally sophisticated machine after the Outfit kidnaps Wilkes and forces him to set a trap.
While helping one of the last families resisting the Outfit, Astor becomes stranded in a small town where he befriends a boy who unknowingly idolizes him.
Wilkes befriends Anna, a co-worker at the rehabilitation center whose boyfriend is an old enemy out to locate the Viper's hiding place.
To obtain the microchip that contains his lost memory, Astor breaks the law to get an amnesia implant for a brain surgeon.
The Outfit, a powerful crime syndicate, terrorizes the city. With Dorian Harewood, James McCaffrey and Joe Nipote.