This Week

Chuck "Chuck Versus the Ring" (2x22). In the Season 2 finale, Ellie and Awesome's wedding day arrives, but Chuck must spring into action to save his sister from evil Fulcrum forces and one Ted Roark (Chevy Chase). Guest stars include Scott Bakula, Morgan Fairchild, Bruce Boxleitner and Tony Hale.
Heroes "An Invisible Thread" (3x25). Nathan takes on Sylar in order to shield the president in the third-season finale. Elsewhere, Hiro discovers unexpected side effects from recovering his ability, and Matt takes extreme measures to protect his family.
Medium "The Devil Inside: Part 2" (5x12). Conclusion. Allison continues to be mercilessly persecuted by her demonic stalker, who even penetrates her visions, making her an unreliable source during an investigation into serial killings. Meanwhile, Joe tries to save his company by exploiting Marie's newfound gift of predicting stock movement.
Reaper "No Reaper Left Behind" (2x09). The Devil sends Sam an attractive tutor (Simone Kessell) to train him for the end times, but Sam plans to seduce her to gain information about how to defeat Satan. Meanwhile, Nina decides to take revenge against Ben and Sock.
Fringe "Midnight" (1x18). When a serial killer is draining victims of spinal fluid, the investigation by Olivia, Peter and Walter leads to a scientist who may be linked to a ZFT cell of bioterrorists.
Smallville "Beast" (8x20). Clark discovers Davis is alive and confronts Chloe about her role in hiding him. Meanwhile, Oliver and Jimmy are attacked by Davis at Chloe's apartment.
Supernatural "The Rapture" (4x20). Castiel visits Dean in a dream and tells him he has important news. Dean and Sam set out on a search for Castiel, only to find his human vessel, Jimmy, who yearns for a normal life and to return to his family.
Ghost Whisperer "Cursed" (4x21). A girl's dollhouse is haunted by ghosts.
Dollhouse "Briar Rose" (1x11). Alan Tudyk guest stars as the Dollhouse designer, who finds himself the focus of Ballard's investigation. Meanwhile, Echo helps a young girl cope with her painful past; Adelle searches the attic for answers; and Alpha reveals himself.
Legend of the Seeker "Cursed" (1x19). King Gregor persuades Shota the sorcerer to transform him into a vicious beast at sundown each day so he can protect his realm from the D'Harans. But that viciousness takes an unintended---and tragic---turn, leading to a dilemma for Richard.