Eleven years ago.

Ten years ago.

As Annie prepares the cafeteria for the midterm dance, she and professor Hickey must deal with the head custodian, the head of IT and the head of parking.

When Joan revisits one of Sherlock’s cold cases, she discovers an unsolved murder is connected to a rare prehistoric fossil. Meanwhile, Sherlock finds himself in uncharted territory when his duties as a sobriety sponsor cross his personal boundaries.

TV host Dr. Phil McGraw; from "Counting Cars", TV personality Danny Koker; musical guests Dum Dum Girls.

On Ann and Chris's last night in Pawnee, Leslie throws a grand farewell party and attempts to fulfill one last promise. Meanwhile, Tom, Ben, Ron and Andy struggle to find the perfect going away gift for Chris.

When a plot to kill Bash goes wrong, Queen Catherine is suspected of orchestrating it. Mary offers to help free a wrongly imprisoned pregnant peasant named Isobel who has a mysterious tie to Bash. Meanwhile, Lola blackmails Queen Catherine to keep her from trying to ruin Mary and Bash, whose bond continues to grow.

Alex is on her way home to unwind after a long day at work – but all that changes when she witnesses a traumatic accident and is forced to return to work, where the Hope Zion Hospital doctors must work tirelessly against the clock to save a problematic John Doe. Meanwhile, Charlie and Gavin explore Charlie's relationship to the Spirit World in a therapy session.

Unable to get Comic-Con tickets, Sheldon tries to hold his own convention and ends up spending a wild evening with James Earl Jones; the ladies try to act maturely.

The NFL rethinks their marijuana policy, football might cause brain damage, the mayors of Denver and Seattle root for their home team, and Drew Brees talks "Playoff Face Off."

From "New Girl", actor Max Greenfield; musical guest ZZ Ward.

When Enzo brings Damon a gruesome present and insists that they bond by committing an act of revenge, Damon makes an effort to do the honorable thing. After finding himself in awkward and confusing conversations with Nadia, Matt impulsively decides to throw a party, where Caroline makes a stunning confession to Elena, then has to face the consequence of her actions with Stefan and Tyler. Aaron does his best to make amends for his family's past misdeeds and start a new life for himself. Finally, Elena suddenly finds herself in a life-threatening situation with only minutes to figure out how to save herself.

Neal and Peter race against a criminal mastermind to unearth an invaluable treasure hidden in New York.