This Week (Apr. 13 - 20)

Can you feel the season building up toward the end? A lot of our shows only have a handful of episodes left, and they're spacing them out so that the finales can be in May. Fortunately this summer there'll be plenty of new stuff, including the return of Eureka and some new series as well.

New episodes this week? Only for Chuck, Heroes, Medium, Reaper, Fringe, and Krod Mandoon and the Flaming Sword of Fire.

Guest stars this week: Chuck works to rescue his father, played Scott Bakula. The same episode also sees the return of Jordana Brewster (Fast & Furious) as Jill.

Meanwhile, over in the drama world, CSI is having a pull-out-the-stops "sci fi episode," featuring Kate Vernon (Battlestar Galactica) and Michael Welch (Twilight).

Synopses below the jump. Details in the listings (regular or alphabetical).

• Chuck "Chuck Versus the First Kill" 2x20. When Chuck's father (Scott Bakula) is abducted by Fulcrum forces, Chuck attempts to rescue him by putting his faith in a most unlikely person – his double-crossing ex-girlfriend, Jill (Jordana Brewster). Meanwhile, at Buy More, the nerd herd tries to derail a corporate evaluation supervised by Emmett (Tony Hale).
• Heroes "1961" 3x23. Angela delves into her past and reveals long-held secrets. Elsewhere, Mohinder finds out that his dad was involved in an old government operation.
• Medium "Then...and Again" 5x10. When a shooter guns down Allison and Devalos, Allison awakens five years earlier in her own past – and nine months pregnant with third child Marie. Now in 2004, Allison's weaving dreams inform her that an innocent man will be convicted of murder, so she works to clear his good name.
• Reaper "The Good Soil" 2x07. The Devil orders Sam and Morgan to spend time together, but Morgan bails when it's time to capture a soul. Meanwhile, Nina tries to take Ben flying, but his fear of heights gets in the way.
• Fringe "Unleashed" 1x16. An animal-rights organization's rescue mission at a laboratory backfires when it releases a vicious beast, almost mythological in appearance with a lion's body and eagle's talons, and Charlie is in danger of being its latest victim.
• Krod Mandoon and the Flaming Sword of Fire "Our Bounties Ourselves" 1x03. Krod fights bounty hunters hired by Dongalor, who worries that the arrival of a weapons inspector will put his relationship with his new girlfriend in danger.