Viper - Season 4 (1998)

Following the death of a Columbian drug kingpin, Astor gets involved with the dead man's widow, while Westlake and Frankie try to figure out who's behind a series of hits against the cartel.

When a man who claims to be innocent is freed during a prison break, the team races to locate him before an overzealous bounty hunter does.

Frankie goes undercover as an exotic male dancer to investigate the murder of a city councilwoman last seen at a women's strip club. Catlett gives Frankie lessons on how to dance.

Westlake comes to the aid of a friend of hers when the woman's used car salesman husband is targeted by criminals.

After an explosion at a Veterans' Affairs office, Westlake and the team try to uncover who was behind it and what their motive was. Westlake bonds with one of the victim's children.

The race is on to find a cache stolen diamonds after an aging gangster dies and leaves his estate to his daughter, who is threatened by two rival mobsters. Astor and Westlake both go undercover with each of the mobsters.

Astor's past as Michael Payton comes back to haunt him when a suspect recognizes him during a bust. Meanwhile, the Viper team is dogged by an unscrupulous tabloid TV reporter determined to prove the existence of the Defender.

Catlett and the team intervene when someone begins trying to kill his well-known crime novelist brother, which gives Catlett the chance to picture himself as the protagonist in his brother's latest manuscript.

Julian Wilkes returns to showcase the Viper project for the mayors of several other major cities, but things get complicated when an old enemy of Westlake's returns for revenge and to steal the Viper, taking over a hotel in the process.

When a sting involving federal diamonds goes south the team track down a former bank robber, now living a seemingly perfect domestic life, which necessitates Astor and Westlake going undercover as a married couple.

When a cultured jewel thief targets the large gemstone necklace of a spoiled hotel heiress, the Viper team must intervene to protect her and the necklace. Meanwhile, Frankie is tormented by an escaped rat in the complex.

While Westlake is away visiting her mother, Astor's plans of attending a basketball game are disrupted by two desperate bank robbers who take him and another bystander hostage in her home.

After the top secret formula for a beverage company's famous soda is stolen, the team is pulled into the world of corporate espionage as they try to recover it before it falls into the hands of the company's rivals.

As Frankie pursues a relationship with a woman (Joy Tanner) who claims to be a psychic, Astor and Westlake try to track down a stolen high-tech "smart" sniper rifle and ascertain the reason behind its theft.

When an attempt is made on the life of a visiting Buddhist leader, Astor and Westlake are assigned to his protection detail, but must contend with the young man's desire to embrace American culture.

After someone begins targeting Julian Wilkes' former colleagues, he and the Viper team must determine why someone is after this particular group. To help investigate, Catlett assigns another federal agent.

As a Japanese mobster aims to do business in Metro City, Astor reunites with a Tokyo police inspector--and old flame--sent to extradite a criminal back to Japan. Her arrival causes Astor and Westlake to re-examine their relationship.

Astor and the Defender are hit by an electric shock that disables the Defender and causes Astor to revert back to Michael Payton--with no memory of his time with Metropol.

(Part 2) (Series Finale) Westlake and Frankie try to reach Astor as the chip in his brain continues to break down, causing his Payton and Astor personalities to fight for control.