Lee suspects that retired Agency founder Harry Thornton and former Soviet Embassy courier Christina Golitsyn are on an impossible mission: to obtain Khrushchev's spy list implicating American Government officials. 

Lee links his escaped nemesis and Francine's old fiancé, who suddenly returns after five years.

Francine and Lee fall victim to a KGB plan to humiliate the Agency.

Lee investigates when priceless jewels and a top-secret spy list stolen during the invasion of Grenada, are among the birthday gifts given to his former girlfriend.

The Agency is blamed for the kidnapping of a famous poet and vocal critic of the United States. Lee and Amanda are charged to find him and exonerate the Agency.

Amanda and Lee's honeymoon is unexpectedly and tragically cut short when Amanda is shot by gold smuggling thieves.

A million dollar art heist and a murder get in the way of Amanda and Lee's wedding.

When the Russians inject Lee with a lethal drug that leaves him with just hours to live, he and Amanda must find the antidote before time runs out.

A skeleton identified as Lee Stetson is discovered in a demolished building, exposing a phony passport ring.

The DEA provides evidence that the man connected to a drug kingpin is Lee's friend T.P. Aquinas.

Amanda's mother turns out to be dating a man with a false name and a debt to the mob.

Just before Christmas, a disgruntled ex-toy designer gives Lee a tip on a toy factory that's a front for sophisticated weapons development. 

Amanda and Lee must stop a maniacal newspaper magnate who is using his considerable power as a ploy to destroy the nation's security.

A Vietnamese double agent must fake his death twice, trying to rescue his son from captors; Lee and Amanda have second thoughts about how their marriage would affect her family. 

A spy starts a smear campaign against Amanda, who's suspended after a background check reveals that she was once involved in anti-American demonstrations.

Found beaten and disoriented in an alley, Billy retraces a lost weekend with Amanda and Lee's help.

Lee's attempts to make long range plans are interrupted when Amanda is taken hostage by an Arab terrorist, who wants to trade her to the Libyans.

A chemist who once worked with Amanda on ecology issues is sought by the Agency and a terrorist after he inadvertently taps into the Capital's water-purification system. 

A frightened Soviet is found hiding in Amanda's yard, claiming that the KGB smuggled him into the U.S. to help knock out America's strategic-command system.

CIA files indicate that Lee's parents were double agents, and link the past with a current plot to assassinate a dignitary.

Conclusion. Suspected of selling out to the Soviets, Lee and Amanda go into hiding after learning Lee is the target of an Agency manhunt.

In the fourth-season opener, a vindictive KGB agent traps Lee and Amanda in an elaborate sting operation, which leads the Agency to suspect the two may have sold out.