The TVLine-Up: TV Worth Watching This Friday

On TV this Friday: Nikita reflects on Amanda’s less-evil days, 20/20 has a cautionary tale for prospective Mega Millions winners, Spartacus and Merlin wage final battles and more. As but a supplement to TVLine’s original features (linked within), here are eight programs to keep on your radar.

8 pm Undercover Boss (CBS) | The CEO of Yankee Candle Co. learns the basics. I’m thinking, “Wax on, wax off”…?

8 pm Nikita (The CW) | Nikita recalls what Amanda was like when she was first brought to Division; Alex surprises Ari by showing up at the board meeting with a powerful friend. (Watch an exclusive video sneak peek!)

CSI: NY Returns Tonight! Greek Grads Spencer Grammer, Aaron Hill Talk ‘Surprise’ On-Screen Reunion

9 pm Fringe (Fox) | The Fringe team faces a case that appears familiar to Peter — but, strangely, takes place in this tweaked timeline.

9 pm Grimm (NBC) | When a murdered shop owner’s sister (guest star Bree Turner) comes to town, Nick thinks he may have found a new ally in the creature world; Renard enlists Adalind to cast a spell on Hank.

9 pm Fairly Legal (USA Network) | A judge orders Kate to mediate an insurance dispute between a fishing boat captain and a deckhand involved in a debilitating accident. Tahmoh Penikett (Battlestar Galactica) guest-stars.

Supernatural Hot Shots: DJ Qualls Returns, and Dean and Sam Battle a Scary [Spoiler]!

10 pm Spartacus: Vengeance (Starz) | Season finale: In “Wrath of the Gods,” as dwindling supplies and a superior Roman enemy brings the rebellion to its knees, Spartacus must restore hope to his people as they careen towards their final confrontation with Glaber’s army.

10 pm Merlin (Syfy) | Season finale, Part 2: With Camelot firmly in the grasp of Morgana and her reign of terror, Merlin must go to extraordinary measures to restore Arthur’s faith and prove to the young King that he was truly born to rule.

10 pm 20/20 (ABC) | Right before the live $500 million Mega Millions drawing at 11 pm, Barbara Walters & Co. look at past lottery winners and losers, as well as the scammers and swindlers who vie for a slice of the winner’s pie, asking the age-old question: Can money buy happiness? [Insert witty rejoinder here.]

Which of the above is must-see for you? Also, hit Comments to offer your own tune-in suggestions.