Nearly all of Joss Whedon's major projects are available for instant viewing on Netflix, as well as other common sources of streaming video, like Hulu Plus and Amazon Prime. As of January 2014, the movies and TV shows below are available to stream instantly on Netflix in the United States.
While watching this entire list would be impossible to do in a day, a week or even a month, they're all must-see movies and TV shows for fans of Joss Whedon. Anyone who hasn't seen works by Whedon can find something to love among these streaming titles. "Buffy the Vampire Slayer" is always a good place to start, since it is what brought Whedon to the attention of TV fans and critics alike.
In addition to the items on this list, Netflix is also streaming the meta-horror film "The Cabin in the Woods," which Joss Whedon wrote but did not direct. It features some Whedonverse actors, including Fran Kranz ("Dollhouse"), Amy Acker ("Angel"), and Tom Lenk ("Buffy").
Joss Whedon's 2012 film brought many of the Marvel Cinematic Universe's heroes together in one big, action-packed film. Watch it in preparation for 2015's sequel, "The Avengers: Age of Ultron."
Buffy the Vampire Slayer
"Buffy the Vampire Slayer" is what truly brought Joss Whedon into the spotlight. There are 7 seasons, 144 episodes of this show - it may take a while to get through, but it is worth every second.
The only spinoff of "Buffy," "Angel" follows her ex-boyfriend, a vampire with a soul, as he solves crime in Los Angeles. There are quite a few crossovers between the two shows, and plot lines from each sometimes intersect with each other.
This is Joss Whedon's short-lived 2002 series about the crew of a spaceship fighting against their oppressive government. It may not have many episodes, but "Firefly" is a cult TV classic that is adored in the sci-fi world.
"Serenity" is the 2005 big-screen followup to "Firefly." Fans and the crew fought hard to get this film made. Joss Whedon delivered a film that can be enjoyed by itself, but is just as great for fans of the TV series.
"Dollhouse" is Joss Whedon's fourth TV series. It stars Eliza Dushku and focuses on a corporation that runs an illegal establishment which provides very rich clientele with anything they could possibly want: a spy, a sex slave or something else entirely.
Dr. Horrible's Sing-Along Blog
This 45-minute musical was originally broadcast as an internet miniseries in three acts. It stars Neil Patrick Harris as the titular character, a wannabe supervillain. Joss Whedon wrote and directed this along with his brothers Zack and Jed, and Jed's wife Maurissa Tancharoen.
Done the Impossible
"Done the Impossible" is the only item on this list not directed by Joss Whedon. It is a fan-made documentary about those who love "Firefly" and fought for "Serenity" to be made. It is hosted by Adam Baldwin, who played Jayne on "Firefly" and Marcus Hamilton on "Angel."