The team is surprised when Gibbs asks Tony's father to join them in a murder investigation.

Nathan's career as an agent takes a big step forward when he visits Atlanta, and the drama between Brooke and Sylvia finally comes to a head.

After the Girls Leave the Glee Club, Mr. Shuester make them do 'Teenage Dream' to get the girls back.

One couple is eliminated from the competition. Special guest performances and dancing round out the evening.

When Stephanie's hard-to-please parents, Barbara and Allan Crane, pay an unexpected visit, the Powells must curb the use of their powers for fear of giving away their secret. But Barbara and Allan begin to suspect that something's awry when they witness some strange behavior. Meanwhile, when friend Trent Stafford and his parents are the victims of a home invasion, Daphne uses her abilities to help Jim try to track down the thugs responsible for the violent act.

Host Alison Sweeney greets players with the news that the black and blue teams are being dissolved, and instead, they'll be competing as pairs this week. A high-calorie dinner temptation will determine who gets to choose the pairs, and the winning contestant's choices for teams creates tension in the house and alienates at least one player who feels betrayed. Trainers Bob Harper and Jillian Michaels work the contestants especially hard this week, and confront a few of the players about issues they can't seem to get past. Later, the pairs compete in a crazy challenge stacking sugar cubes, followed by the most explosive weigh-in yet this season, with heated exchanges taking place among the contestants and the trainers. A surprising elimination follows, sending two more players home.

The Rafter family say an emotional farewell to Melissa.

Dogs have been domesticated for longer than any other animal on the planet, and humans have developed a unique relationship with these furry friends. We treat our pets like a part of the family, and we feel that they can understand us in a way other animals cannot. Now, new research is revealing what dog lovers have suspected all along: Dogs have an uncanny ability to read and respond to human emotions. What is surprising, however, is new research showing that humans, in turn, respond to dogs with the same hormone responsible for bonding mothers to their babies. How did this incredible relationship between humans and dogs come to be? And how can dogs, so closely related to fearsome wild wolves, behave so differently? It's all in the genes. Dogs Decoded investigates new discoveries in genetics that are illuminating the origin of dogs-with revealing implications for the evolution of human culture as well. NOVA also travels to Siberia, where the mystery of dogs' domestication is being repeated-in foxes. A 50-year-old breeding program is creating an entirely new kind of creature, a tame fox with some surprising similarities to man's best friend. Dogs Decoded reveals the science behind the remarkable bond between humans and their dogs and spurs new questions about what this could mean for our relationships with other animal species.

Mike visits an old-fashioned corn mill in De Kalb, Miss. Also, Mike helps relocate a pair of exotic deer in Wills Point, Texas.

Paul tries to generate a dialogue between Jesse and his stepmother.

Wanted terrorists and top secret information are all involved in NCIS's investigation into the kidnapping and murder of a retired Army Sergeant.

Young and Rush are trapped on an abandoned alien ship, while Destiny is stranded in deep space. Rush continues to refuse to divulge his secret.

Cate takes Paige out drinking, hoping Paige will reveal more information about the mysterious woman, Julia, from Ryan's past. Ryan joins Baze, Math and Jamie for guys' night out.

When Hope catches a cold, Virginia goes into panic mode because the family doesn't have health insurance, so she locks Maw Maw in her bedroom to avoid getting sick. However, when Jimmy realizes that he can't afford to take Hope to a doctor without insurance, he figures out a way to secure a second job at the grocery store where Sabrina works.

Paul worries about losing Max to a stepfather.

Steve and Andy's rivalry for Emmy's affection reaches a breaking point leading to Steve inadvertently throwing an elaborate Renaissance fairy tale wedding for his adversary and the woman he loves.

SAMCRO attempt to prove to the IRA that Jimmy has flipped in order to resolve their situation.

Alicia, Diane and Will must regroup when they're caught off-guard by a brilliant disabled attorney, Louis Canning, who uses his condition to sway a jury during a test case for a huge class action suit against a pharmaceutical company. Meanwhile, Peter's campaign is at a loss as to what to do with rising star Wendy Scott-Carr, and Kalinda reaches out to a former friend, Donna Seabrook, to tell her to stop spilling her secrets to Blake.

Adam confronts a man in defense of Max. Crosby and Jasmine delve into domestic discussions, beginning with the selling of Crosby's boat. Meanwhile, Sarah and Gordon spend an afternoon together, which carries on until sunrise the next morning, creating tension with Amber and Drew. Elsewhere, Haddie discovers intriguing information about Alex.

Stone and Sanchez, dealing with the fallout from their personal attraction, are assigned with Fitch to investigate the murder of successful executive Abigail James from Detroit's "Tech Town." Is this a case of corporate competition gone haywire or the result of a messy love triangle?

Harrison Ford

Soundgarden, Jack McBrayer, Tom Hanks

Cee-Lo Green

Actor Denzel Washington; Bon Jovi performs.

Dave Salmoni, Chris Pine, Lee DeWyze

After his company is bought out, Simon Williams agrees to become a deadly being of ionic energy in order to exact revenge on Tony Stark. Meanwhile, Wasp and Thor try to locate the secret hideout of a group of AIM agents and encounter another new villain, MODOC.

Kevin meets with Daren Howarth and Adi Nortje who left Brighton to move to Brittany four years ago to take on a huge life experiment. Their idea was to build an earth-sheltered home almost nearly created from recycled materials.

The remaining candidates left in the competition are challenged by Sir Alan to create a branding and advertising campaign for a new multi-purpose household cleaner. One of the candidates is fired by Sir Alan at the end of the show.