With Barry stuck in space, Archer's former fiancée Katya, who is now living as a cyborg herself, seeks Archer's help in getting Barry returned to earth. But as manipulative as Archer is, he has other plans in mind.
While accompanied by Cyril and Ray on a mission in Turkmenistan, Archer comes in contact with a venomous snake with hallucinogenic repercussions. Meanwhile back at ISIS tensions come to a head between Lana and Malory.
The Isis crew takes on an undercover mission working as the wait and bus staff for a celebrity chef. There, they try to save an ambassador from being murdered, while Archer takes on a job as a cook working for the nightmarish head chef and discovers he's a natural.
Archer and Lana go undercover as husband and wife while staying in a luxurious penthouse in New York's high rent district. But tensions between the two soon become as intense as if they actually were a real married couple. Meanwhile, the rest of the Isis crew decides to eavesdrop on the "newlyweds".
The Isis crew heads deep into the Bermuda Triangle to save an underwater sea laboratory from its' deranged leader, thanks to the help of Cheryl's dim-witted brother and his equally dim-witted fiancée, who drive Cheryl crazier than usual.
Once on board the underwater laboratory, the Isis crew find they have very little time to rescue the lab from its' deranged captain. But of course, the Isis crew's conflicts and Archer's recklessly impulsive tendencies don't exactly help things.