An Observer makes contact with the Fringe team to help rectify a mistake. Meanwhile, Walter befriends Roscoe Joyce, one of his musical heroes.
The crew comes to the aid of a bordello when its madam, an old acquaintance of Inara's, asks for help after a gunslinger claims a prostitute’s baby is his and he's taking it because his wife is barren.
A bounty hunter bent on apprehending River -- and collecting the reward for her capture -- boards the ship at night, catching the crew off guard.
The Serenity crew defends a bordello against a gunslinger who got a prostitute pregnant and now intends to collect the child.
What starts out as a nice day at a space station goes very wrong when Mal and Zoe receive the corpse of their old war buddy in the mail.
Mal has to make a tough choice in whether he should trust Saffron when she offers the Serenity crew an opportunity to make a lot of money on a risky job.
Tensions begin to run high on board the Serenity when Wash finds himself feeling threatened by the closeness between Mal and Zoe.
On return to Ariel, Simon hires the crew out to smuggle River into a hospital so Simon can figure out what the Alliance did to her.
The Serenity engine explodes, leaving the crew low on oxygen and adrift in deep space.
The Serenity crew pulls a job in a town where Jayne once made some friends and few lifelong enemies.
Mal unwittingly marries a beautiful village girl during a job in the backwater. But the surprises don't end there. Christina Hendricks guest stars.
Things go terribly wrong during a job on an outer planet; both Simon and River are kidnapped by the locals in need of a doctor, while the rest of the crew finds themselves in need a doctor of their own.
On a mission to transport some goods on the planet Persephone, the Serenity crew attend a ball where Mal finds himself at odds with one of Inara's "clients".
After a celebration in which the crew is honored for ridding a planet of a group of bandits, they return to Serenity to find a woman named Saffron who claims that Mal married her during the festivities.
Mal and his crew are hired to pull off a train heist, but the cargo turns out to be badly needed medication for sufferers of a deadly disease.
After taking aboard a group of passengers bound for another planet, the crew encounters lawmen and savages as they try to rid of precious cargo.
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