While searching for the killer of an infamous hacker, the three Lone Gunmen find a fourth member when they stumble upon a practice of a football team for the blind.
Frohike has to disguise himself as the long-lost son of a woman who is believed to be a Nazi war criminal that the Gunmen are trying to smoke out of the woodwork. She was famed for poisoning the pastries of the French Resistance.
The Lone Gunmen become reluctant and rather inept nursemaids to the illegitimate baby of a drunk, philandering, saxophone-playing Senator whose campaign-aide girlfriend died in a suspicious accident.
This is the episode where, as Bruce Harwood put it in one chat, "Tom gets his nipples sucked!"
After the Lone Gunmen ruin her first attempt to get close to a suspected smuggler, Yves arranges to become the man's partner in a tango competition -- with a little help from her... ah... friends.
The boys' investigation into the shooting death of the brother of Byers' college roommate, a blackmailer, yields a definite suspect: FBI Asst. Director Walter Skinner.
The Lone Gunmen team up with Man in Black agent Morris Fletcher to find Yves. What they uncover is Romeo-61, a secret government organization responsible for decades of major incidents. The sequel to this episode is X-Files S09E15 - Jump the Shark