Matt's Inside Line on Castle Bombshells, Secret Circle, True Blood, OLTL Finale, Revenge & More

Is a Castle secret about to spill? Will True Blood‘s Alcide step into a parent trap? What can One Life fans expect from the finale? Read on for those scoops, plus other teases from TV’s hottest shows.

Castle | Throughout the intensity of “Kill Shot” and the flirty fun of “Cuffed,” one can’t be blamed for forgetting that there are still a pair of potent secrets being kept — that Rick purposely waved Beckett off the unsolved mystery of her mother’s murder, and Kate remembers Rick’s season finale “I love you.” Castle’s secret “will resurface” by season’s end, series boss Andrew W. Marlowe tells me. And at the worst possible time, might we assume? “Well, we wouldn’t be dramatists if it came at the best time,” he answers with a wink. “And I will tell you that it will have an impact on their relationship.” Want a scooch more angst, Caskett ‘shippers? Well here it is: “Beckett’s secret might resurface even earlier,” Marlowe teases.

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Revenge | As teased in this week’s Ask Ausiello, Emily Thorne will unleash a fresh batch of the R-word when Desperate Housewives alum Roger Bart surfaces as a journalist looking to pen a tell-all about the Hamptons’ elite – one mysterious blonde beauty included. The twist, per Emily VanCamp, is that while this scribe is in the dark about Daniel Grayson’s steady, “I know everything about him, and he doesn’t know that, so I get to play with fire.” EVC goes on to rave that “the episode is really fun because we go back to the old-school takedown – and Emily has been itchin’ for one!”

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Parks and Recreation | Dipping into the reader mailbag, Nane begs, “Please give me anything on Parks and Recreation!” Well, as Leslie scales back her office hours to hit the campaign trail, there’ll be a need to hire an extra hand at the P&R Department, and you can imagine the two very different styles of job interviews offered by Chris versus Ron. (For one, a candidate named Tammy is promptly dismissed.) Meanwhile, as Leslie presses the flesh in her bid for a city council seat, the rival candidate’s campaign manager (to be played by Kathryn Hahn) will prove quite formidable — if not downright crafty/wily, especially when it comes to targeting Pawnee’s electoral sweet spot: the “gray vote” (aka old folks).

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The Good Wife | We at TVLine have been pretty vocal with our praise for this acclaimed CBS drama’s casting department – so you can understand our enthusiasm when we got wind of the full guest star list for Episode 15, which will air at the end of January. Because in addition to Glee alum Jonathan Groff, the very same episode will host encores from Parker Posey (as Eli’s ex-wife), Dennis O’Hare (blood donor-happy Judge Abernathy), Rita Wilson (attorney Viola Walsh), John Benjamin Hickey (social networking site boss Neil Gross) and Amy Sedaris (Eli’s rival, Stacie Hall). Where do the Emmy voters even start?

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True Blood | Remember Alcide’s crazy ex, Debbie Pelt? Well she’s about to be crazy with family. The HBO drama is in the process of casting the not-so-dearly departed’s mom and dad, Barbara and Gordon, who will hit Bon Temps loaded with questions bout their “missing” little girl. Though both ‘rents are described as “kindly,” Gordon will be riled up and grow defensive soon enough when Alcide speaks ill of the dead. Er, of the “missing.”

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One Life to Live | Will this ABC soap’s fans be left hanging come Friday, Jan. 13, as their All My Children counterparts were? Mayyyybe not. Though Florencia Lozano, when I visited the set in November, suggested that the “Who killed Victor?” storyline would serve up a cliffhanger in the series’ final episode, I am now hearing that’s not necessarily in the case. What is certain, a source tells me, is that there will be “a major development” in that murder mystery during the sudser’s final hour. Might Tomas be absolved of his fabricated guilt in the crime? Ted King told me to expect a final twist involving his abducted alter ego.

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The Secret Circle | Will Diana be up at ’em, romantically, now that she’s split from Adam? When the season resumes this Thursday, “She is struggling to deal with her breakup,” says EP Andrew Miller. “It’s easier said than done when you push someone away and say that you don’t want to see them anymore, so she’s got some emotional baggage to deal with.” Soon, though, someone could help the brunette beauty “unpack” said bags. “You can’t keep someone like Diana untangled for very long, so she will have some love in her life,” Miller hints. “It’s impossible not to.”

If there’s a show you’d like the Inside Line on, email mattmtvguy@gmail.com, and maybe it’ll get some love the next time around! (With reporting by Vlada Gelman)