2010's Best Episodes: Grey's Anatomy's Crazed Gunman and Lost's Emotional Farewell

It was a great year for TV, which made it very difficult to choose the top 25 episodes of 2010. Recalling and, in some cases, rewatching the stand-out moments was a holiday treat. We got our first glimpse of a bespectacled Clark Kent and saw Snooki pummel Angelina. We wept as Jack Shephard took his final breath and cheered as Leslie took down a mischievous rodent wreaking havoc in Pawnee. Here's the fourth batch of TVGuide.com's weeklong countdown of the year's best episodes. (Catch up first with Episodes 25-21, Episodes 20-16, and Episodes 15-11.)
10. "Sanctuary/Death and All His Friends," Grey's Anatomy
A shooter roamed through the halls of Seattle Grace, killing off many of the doctors we have come to know and love, and leaving several others on death's door, including Derek Shepherd. After Meredith offered to sacrifice herself to protect the other doctors and subsequently had a miscarriage, the veteran series was taken to a new, deeper level.
9. "Peter," Fringe
This flashback hour not only expanded the show's mythology of the alternate universe, but revealed the painful backstory behind Walter's decision to kidnap Peter's doppelganger after "his" 7-year-old Peter died. John Noble's sublime dual turn delicately balanced the audacity and distress of a grieving parent. This episode also marked the debut of '80s-style opening credits.
8. "The End," Lost
Say what you will about finale not providing enough answers — we've said it all too. But we still reached for the Kleenex as each character received his or her emotional payoff. Was the great-white-light ending a little confounding? Perhaps, but in the end the finale inspired endless debate — just like the show itself always did.
7. "Thanksgiving," Friday Night Lights
With Thanksgiving as its backdrop, the Season 4 finale featured heart-wrenching farewells and tough decisions. Tim Riggins proved the kind of man he was by taking the fall for his brother's illegal actions. Tami decided not to give in to the school board for advising Becky of her options. Julie and Matt found each other again only to say goodbye. And Landry finally became the town hero with a 46-yard field goal to win the game. Why can't all dramas be this heartfelt?  

6. "Day 8: 3:00 p.m.-4:00 p.m.," 24
24's final hour ended on a complicated note — President Taylor realized the grave error of her ways, while Charles Logan went down for good. But it was Jack, hurt, spent and forced to go on the run, whose predicament was both familiar and bittersweet for those fans wanting closure. His tearful goodbye with Chloe — appropriately via video screen — broke our hearts.
Check back all week as we count down to No. 1. What were your favorite episodes of the year?