TV Guide Syfy Tuesday

A school detention class is thrown into chaos when a teacher is killed and the pupils run riot - unaware that a deadly therocephalian is stalking the corridors looking for its next meal. ARC's attempts to capture the creature are hampered when youngsters hack into the automatic locking system, but the school lab proves invaluable when an even greater threat emerges. Elsewhere, Abby's menagerie is under threat. Hannah Spearritt and Andrew-Lee Potts star

Connor and Abby are sent to investigate unusual anomaly signals in a coastal village, where they uncover the existence of a supposedly mythical labyrinthodont that has turned its attentions to the local fishermen after attacking cows. Back at ARC, Lester and Jess learn that Emily has been kidnapped by Ethan, prompting Matt to make a dash to a cemetery - where he faces a difficult choice. Hannah Spearritt and Andrew-Lee Potts star

Part one of two. Worf learns his father was not killed in a battle 25 years ago, as he had previously thought, but was taken to a distant Romulan penal colony. Meanwhile, Data experiences disturbing visions. Sci-fi adventure, starring Michael Dorn and Brent Spiner

Romance blossoms in Voyager's sick bay as the Doctor creates a holographic clone to house the consciousness of an ailing Vidiian female. Sci-fi drama, starring Kate Mulgrew and Robert Picardo

Kira travels back in time to discover the truth about her mother, only to find herself in a Bajoran refugee camp at the beck and call of a group of lustful Cardassian officers. Starring Nana Visitor

The team stumbles upon the stately-home wedding of ex-ARC member Jenny Lewis while investigating an anomaly. As the bride tries to keep her past hidden from her fiance, she finds herself reliving her old role by helping her former colleagues fight a family of hyaenadons that wreaks havoc at the ceremony. Meanwhile, Becker's life becomes endangered as the hunt for Ethan continues. Hannah Spearritt, Andrew-Lee Potts and Lucy Brown star

ARC tackles a carnivorous terrorbird at a prison tourist attraction after an anomaly opens, which also results in the unexpected reappearance of Danny, who has a warning for the unit. Matt manages to locate Ethan at the same site, but fails to spot the danger he presents, giving him the opportunity to reveal his secrets as he takes revenge on Emily and the team. Jason Flemyng, Hannah Spearritt and Ciaran McMenamin star

O'Neill and the team try to end a deadly war game being played out on a planet populated by soldiers, but find the weapons turned against them. Sci-fi drama, starring Richard Dean Anderson

Romance blossoms in Voyager's sick bay as the Doctor creates a holographic clone to house the consciousness of an ailing Vidiian female. Sci-fi drama, starring Kate Mulgrew and Robert Picardo

In the wake of Bill's blood-soaked reincarnation, Sookie, Eric, Jason, Jessica, Pam and Nora flee the Authority compound. Sam, Luna and Emma find themselves in grave danger, while Louisiana Governor Truman Burrell declares war against all vampires. Supernatural drama, starring Anna Paquin, Stephen Moyer and Alexander Skarsgard

After Tara is targeted by a new government weapon, Eric takes matters into his own hands in an effort to thwart Burrell's anti-vampire initiatives. Meanwhile, a long-lost relative reveals himself to Jason and Sookie, Sam is unnerved by supernatural-rights zealot Nicole, and Bill contemplates the scope of his heightened powers

The team stumbles upon the stately-home wedding of ex-ARC member Jenny Lewis while investigating an anomaly. As the bride tries to keep her past hidden from her fiance, she finds herself reliving her old role by helping her former colleagues fight a family of hyaenadons that wreaks havoc at the ceremony. Meanwhile, Becker's life becomes endangered as the hunt for Ethan continues. Hannah Spearritt, Andrew-Lee Potts and Lucy Brown star

ARC tackles a carnivorous terrorbird at a prison tourist attraction after an anomaly opens, which also results in the unexpected reappearance of Danny, who has a warning for the unit. Matt manages to locate Ethan at the same site, but fails to spot the danger he presents, giving him the opportunity to reveal his secrets as he takes revenge on Emily and the team. Jason Flemyng, Hannah Spearritt and Ciaran McMenamin star