Something terrible has happened to Henry Knight — Sherlock and John investigate the truth about the monstrous creature which apparently killed their client’s father. A hound from hell? What seems like fantasy in Baker Street is a very different prospect in the ultra-secret army base that looms over Dartmoor.
Phil contemplates the worst after missing a call from the doctor. Javier, Manny’s biological father, pays another visit to take his son to the horse races, Mitchell wins an environmental law award, creating a competition between Cam and himself on who has the better trophy. Gloria tutors Haley in Spanish.
After realizing that no one keeps their New Year’s resolutions, Frankie decides that they will be assigned anonymously to each family member, and an all-you-can-eat buffet feast will be the reward for those who can abide by their chosen resolution for a week. But chaos soon ensues when Frankie must spend more time with Brick, Mike needs to smile more, Axl has to keep his bedroom clean, Sue needs to stop trying out for things she’ll never make, and Brick must stop reading all of the time.
After celebrating New Year’s Eve, Marshall visits his father’s graveside to carry on their tradition of tailgating. Meanwhile, Barney and Ted open a bar called « Puzzles, » and Robin is forced to fill in for an inebriated news anchor.
A case of blackmail threatens to topple the monarchy itself, but soon Sherlock and John discover there is even more to it than that. They find themselves battling international terrorism, rogue CIA agents and a secret conspiracy involving the British government. But this case will cast a longer shadow on their lives than they could ever imagine, as the great detective begins a long duel of wits with an antagonist as cold and ruthless and brilliant as himself: Irene Adler.
The 11th Pilgrimage arrives in Terra Nova and the mysterious Phoenix Group in 2149 makes its move to pillage the past with the help of Lucas and Mira. Meanwhile, Jim and Taylor team up in a last stand against the Phoenix Group, a colonist makes the ultimate sacrifice and a decision is made that will change life in Terra Nova forever.
While Carrie is near catatonic and confined to bed, Saul investigates the unsettling implications of her timeline; Walker secures a perch for his mission; Brody makes his final preparations for the Vice President’s policy summit at the State Department.
Jane almost drowns while investigating a fireman’s murder and loses his memory, turning him into his old con man self.
Lucas races to assemble the final pieces of his mystery device, in advance of the 11th Pilgrimage’s arrival. Also, Jim and Taylor confront the colony’s « Sixer » mole, Skye is reunited with a familiar face and Terra Nova prepares for war.
As Alicia looks for a way to have a judgment thrown out following a shocking guilty verdict, she also begins to feel the consequences of decisions in her personal life.