Firefly - Season 1 - Eps 8: Ariel
Hard up for cash, Serenity takes on a job from Simon: help him get a thorough diagnostic of River in return for the opportunity to loot the vast medical stores of an Alliance hospital on central world Ariel. But River's pursuers are hot on their trail, and they receive some unexpected inside help.
About Firefly

Title: Firefly
First Air Date: 2002-09-20
Last Air Date: 2002-12-20
Status: Canceled
Rating: 8.333/10 (from 2151 votes)
Language: EN
Seasons: 2
Total Episodes: 11
Network: FOX
Genres: Drama, Action & Adventure, Sci-Fi & Fantasy
Production Companies: Mutant Enemy Productions, 20th Century Fox Television
Synopsis
In the year 2517, after the arrival of humans in a new star system, follow the adventures of the renegade crew of Serenity, a "Firefly-class" spaceship.
Cast

Nathan Fillion
Mal Reynolds

Gina Torres
Zoë Washburne

Alan Tudyk
Hoban Washburne

Morena Baccarin
Inara Serra

Adam Baldwin
Jayne Cobb

Jewel Staite
Kaylee Frye

Sean Maher
Simon Tam

Summer Glau
River Tam

Ron Glass
Derrial Book