TV Guide Syfy Sunday

Nick and Hank investigate when a child goes missing, uncovering several similar cases all linked by sightings of a mysterious ghostly presence. It transpires that the Weeping Woman - or La Llorona - is a ghost who kidnaps three children every Halloween and drowns them, hoping their sacrifice can atone for the loss of her own children, whom she also drowned. David Giuntoli stars

After O'Neill and the team help relocate displaced aliens to a new homeworld, another civilisation tries to colonise the same planet, leaving the team striving to discover a fair solution to the dilemma. Sci-fi drama, starring Richard Dean Anderson and Amanda Tapping

O'Neill, Carter, Daniel and Teal'c are brainwashed, given new memories and put to work in the mines beneath an ice-covered planet, leaving General Hammond to face the possibility that his team is dead. Sci-fi drama, starring Richard Dean Anderson and Michael Shanks

Hammond orders O'Neill and the team to investigate a conspiracy theorist in Montana who claims he is an alien and in possession of a spaceship. While SG-1 is initially sceptical it begins to appear that there is some truth to his story. Sci-fi drama, starring Richard Dean Anderson and Amanda Tapping

The test flight of a Goa'uld death glider goes wrong, sending Teal'c and O'Neill hurtling through space, and leaving the crew at the SGC struggling to rescue them. Sci-fi adventure, starring Richard Dean Anderson, Christopher Judge and Michael Shanks

Daniel investigates when one of his former professors dies in suspicious circumstances. Discovering the tutor was studying an ancient Egyptian Goa'uld symbiote, he faces a race against time to save the college from a terrible curse. Michael Shanks and Richard Dean Anderson star

A lieutenant is found murdered in his quarters, revealing a possible connection to a disturbing dream experienced by Ezri in which she encountered one of Dax's previous hosts. Sci-fi drama, starring Nicole de Boer and Avery Brooks

The holosuite malfunctions, trapping DS9's senior staff in a Las Vegas crime caper, where they must save one of the characters from seemingly certain death. Sci-fi adventure, starring Avery Brooks and Rene Auberjonois

Dwarf king Thorin reclaims control of his homeland, but his descent into madness places him on the brink of war with his human and elven allies. As Thorin's Hobbit friend Bilbo tries to save the tormented ruler from himself, a vast horde of orcs gathers to destroy them all. Conclusion of the fantasy adventure trilogy, starring Martin Freeman, Richard Armitage, Ian McKellen, Luke Evans and Orlando Bloom

After experiencing disturbing visions, Nick discovers a fellow Grimm is torturing and murdering monsters that have harmed humans, spreading panic among the Wesen creatures. Renard and Juliette's connection moves to the next level. David Giuntoli stars

Hank reflects on an arrest for murder he made of a man who claimed monsters were involved. With the man's death sentence approaching and the knowledge he has recently acquired from Nick, Hank begins to wonder if the man's absurd claims were true and that he may be innocent of the crime. Meanwhile, Monroe finds himself involved in a situation he never saw coming.

Nick finds out about Juliette's relationship with Renard - who is frantically searching for the key - and can barely control the urge for revenge. Monroe and Rosalee piece together information about the curse and eventually work out how the passion spell can be broken. Meanwhile, Adalind returns to Renard's duplicitous brother in Vienna