A pair of Broward County Sheriff's Officers set up a sting to apprehend a drug dealer, but turns into a foot race when the suspect flees. Then, a Hillsborough County Sheriff's Deputy pulls over a vehicle for committing a traffic violation. Lastly, a Las Vegas Metropolitan Police Officer check out a claim that a woman was abused and kidnapped by her boyfriend.

Sam has a twin sister named Melanie (Portrayed by Jennette McCurdy). Freddie is not convinced, and to try to prove it, he sees Melanie in person and invites her to a dance with him as his date. The plan to try to prove that Melanie is really Sam takes an unexpected turn when Melanie kisses Freddie, who then becomes extremely paranoid. Meanwhile, In the end, since Freddie refuses to believe it, Sam admits to Freddie that there is no Melanie. Satisfied, Freddie departs right before Melanie (who reveals that she still has romantic feelings for him) arrives to go to the mall with Sam and Carly. Meanwhile, Carly tries to tutor Chuck in math, and Spencer shows Carly how evil Chuck really is (with the help of a hidden video camera that Socko set up). Carly gets revenge on Chuck by telling him there's a new number called "dirf" between 5 and 6, and because of this, Chuck fails his math test and Spencer gives his dad a brochure about a summer math camp called Camp Add-m-Up, sending Chuck to math camp for the whole summer.

When David is arrested for treason, Silas hands the trial to Jack to deal with.

Eli is convinced that one of his friends will die in a plane crash he sees in a vision.

John Wakefield's murderous rampage continues, as the survivors plot to find and kill him before they are all wiped out.

The answers are finally unveiled in the season finale.

Invention Test 9 - In the first challenge of the Finals Week, the contestants were asked to cook a meal under ten dollars using ingredients bought from the pantry that was converted into a supermarket

Scar and Yoki gain a new companion in the form of a young girl from Xing named Mei Chan, who displays her country's unique form of alchemy. Lieutenant Riza Hawkeye recruits an unlikely new ally for Colonel Roy Mustang, whilst Edward and Alphonse return to Rush Valley to get Edward's automail arm, but the brothers encounter Ling Yao from Xing, and his two dangerous bodyguards.

Jeremy, driving a Mitsubishi EVO 7, which has a 'colourful' former owner, is on the run from the British Army, which undoubtedly want to shoot him with an array of interesting, live ordinance.

James and Richard race against a stamp, an envelope and the Royal Mail, to see which can travel the length of Britain most quickly: the Porsche Panamera or a letter.

On the track, Jeremy and Richard compare and squabble over the Ford Focus RS and the Renault Mégane R26.R. Olympic gold medal winning sprinter, Usain Bolt, is the Star in a Reasonably Priced Car, although he would probably be quicker to run.