Holden and his allies must stop Ashford and his team from destroying the Ring, and perhaps all of humanity.

As survivors arrive to the Behemoth, two factions form over how to handle a life-or-death threat; Holden grapples with what he's seen and the choices he must make.

Drummer and Ashford find themselves trapped with few options for survival; Anna tends to the wounded masses as Melba continues to hunt down her prey; the Rocinante crew struggles to survive as Naomi reunites with her true family.

Holden sees past, present, and future; a ghost from Melba's past threatens her mission; Bobbie struggles to trust an old friend as she leads a group into uncharted territory.

The Rocinante seeks a new game plan as they attempt to avoid capture; Melba's true motives are revealed; Naomi is torn between identity and ideal; Anna seeks a way to stay aboard the Thomas Prince.

An old friend taunts Holden with the answers he seeks; Naomi struggles to fit in; a mysterious low-level tech aboard the Thomas Prince enacts a terrifying plan.

All eyes turn to the edge of the solar system as a mysterious new presence emerges; Naomi recommits to her roots; Drummer butts heads with a seasoned new commander aboard the Behemoth; a young Belter makes a name for himself.

The final battle between Earth and Mars threatens the very future of humanity; a new monster is unleashed on Prospero Station; Anna receives the smoking gun she needs.

The search for Prax's daughter comes to a head; Admiral Souther's men plan for mutiny aboard the Thomas Prince.

The Rocinante tends to wounded Martian soldiers in exchange for supplies; Avasarala struggles with how to disseminate a key piece of evidence despite being in hiding.

Earth strategizes a costly ploy to gain advantage in the war against Mars; Anna struggles to convince Sorrento-Gillis to do the right thing; Avasarala and Bobbie seek refuge aboard the Rocinante.

The Rocinante answers an unexpected distress signal; Bobbie and Avasarala find themselves being hunted by a mysterious captor; UN Secretary-General Sorrento-Gillis brings in a colleague from his past to lend an ear during this crucial time of war.

The Rocinante crew deals with the fallout over Naomi's betrayal while caught in the middle of the war between Earth and Mars; Avasarala and Bobbie hatch an escape plan.

The Roci crew must fight to save the ship.

A discovery pushes Naomi and Holden apart and sets the Roci crew against each other.

Bobbie makes a decision that changes her life forever.

Holden leads his crew through the war-torn station on Ganymede.

Bobbie becomes a political pawn in the struggle between Earth and Mars.

Naomi tracks down signs of the protomolecule; Fred Johnson's control over the OPA collapses.

Preparations for the Earth/Mars peace conference tighten the tension on Erringwright.

Earth and Mars search for answers in the aftermath of the asteroid collision.

A trio of bounty hunters, known as Killjoys, chases deadly warrants through the Quad, a distant area that is near the start of a violent class war among multiple planets. Gorgeous but deadly Dutch is a top-level Killjoy who has a unique gift for earning people's trust, regardless of their class. The much-loved Killjoy harbors a dark secret. Kindhearted John is a peacemaker who prefers not to fight. Handsome, loyal former soldier D'avin is experienced in hand-to-hand combat, which makes him a valuable asset to the team.

When crew members working on a derelict spaceship awaken from stasis, they have no memory of who they are or how they got onto the vessel. The only clues to their identities are weaponry and a destination -- a remote mining colony soon to become a war zone. They must band together to fight off the threats they face on a voyage filled with vengeance, betrayal and secrets that make survival a question mark for all on board the ship. In the wake of a betrayal, the crew is split up. Some are imprisoned, while others are sent away to start a new life. The sci-fi series is based on the graphic novel of the same name.

When a group with nefarious intentions attempts to change the world as we know it by altering the past, Lucy, a historian, Wyatt, a soldier, and Rufus, a scientist, unite to form an unlikely partnership, traveling through time to save history. Their riveting adventures take them to some of the most thrilling, volatile and critical events on record, including a venture to the Old West, a sojourn to the Alamo, a visit to the famous Chicago World's Fair and a crusade into Nazi Germany. Along the way, they cross paths with famous historical icons, such as Josephine Baker, Harry Houdini, Ernest Hemingway and infamous rivals Eliot Ness and Al Capone. But every step the team takes to protect history puts everything we know at risk -- because changing one thing changes everything.

A man from the post-apocalyptic future, Cole uses a dangerous, untested method of time travel to get from 2043 to the present day. He is on a mission to locate and rid the world of the source of the plague that will eventually annihilate the human race. Assisting him is Dr. Cassandra Railly, a virologist who must decide whether to do harm in order to save the world -- regardless of the fact that she has taken the Hippocratic oath. The sci-fi series is based on Terry Gilliam's 1995 film, which starred Bruce Willis as Cole.

Quentin Coldwater, a grad student at Brakebills College for Magical Pedagogy, has been fascinated by the magical fantasy world since he was young. But as he has gotten older, Quentin and his 20-something friends have discovered that the magical world they read about as children is not only real, but poses dangers to humanity. While studying at the secret upstate New York school, the friends struggle to cope with the aftermath of a catastrophe that befalls the institution. The fantasy series is based on a series of novels by Lev Grossman.

This update of the late-1970s series takes a decidedly darker tone as what's left of humankind struggles for survival against the robot Cylons, who have killed millions. The Galactica, led by William Adama, protects a patched-together fleet of civilians -- led by de facto president Laura Roslin -- in search of a mythical planet called Earth.

In the not-too-distant future, Los Angeles has been invaded and occupied by outside forces, causing a rift between the city's residents; some have collaborated with the occupation, while others are rebelling and suffering the consequences that come with that choice. Former FBI agent Will Bowman and his wife, Katie, must consider their familial obligations when making their decision because they were separated from their son, Bram, during the invasion. Proxy Snyder, a cunning and powerful leader within the occupational government, offers Will the opportunity to get Bram back if he works with the invading faction. Will's decision doesn't sit well with Katie, but the couple risk their lives -- and their relationship -- to protect their family.

Wynonna Earp has been away from her hometown, Purgatory, for years but returns to reluctantly take on the role that Wyatt Earp's heir is destined for -- demon protector. Her task is to take out Revenants, the resurrected souls of the criminals who were taken down at one time by her great-grandfather. Wynonna teams up with sister Waverly, agent Xavier Dolls and Doc Holliday, the cursed-with-immortality best friend of Wyatt Earp, as they work to stop the Revenants from taking over Purgatory and escaping into the world. The show is based on the graphic novel series of the same name.

"Heroes" creator Tim Kring heads this reboot of the world where extraordinary powers up the ante in the eternal battle of good and evil. A year after being blamed for a terrorist attack that decimated Odessa, Texas, people with abilities are either hiding or trying to avoid those with nefarious motives. Two vigilantes, Luke and Joanne, are determined to avenge a tragic loss, and Noah Bennet has gone off the grid -- until a conspiracy theorist finds him and reveals the truth behind the tragedy in Texas. Other extraordinary people from the past cross paths with new heroes, all of whom share the same destiny: to save the world.