When the ghost Melinda is trying to help suddenly turns up alive, she finds herself in the middle of a dangerous revenge plot and battling enemies she was unaware she had.
When the school's superintendant fires Mr. Laritate because of Alex, Mr. Laritate gets a job at a western place. When the school hires a strict new principal, Alex transports Mr. Laritate back to the Old West in an attempt to show him that it's not what he thought it was and make him want to come back to Tribeca Prep.
Rex and Noah enter the Zoo. A restricted area on the base. Some personal secrets are revealed.
Lt. Tamara Johansen tries to track down what is causing the crew to hallucinate.
See how Miniature furniture; garden steam locomotives; Hovercraft; and folding bicycles are made.
When Zod and the Kandorians launch their brutal attack on Earth, Chloe calls in some old friends to join the fight against the aliens. Clark and Zod face off in an epic battle for the control of Earth.
The funeral of a patriarch goes awry when the deceased's mistress arrives to pay her last repects. Kyle is mesmerized by the possibility of learning the blues from a real bluesman.
Stephen asks Karl questions posed to guests on "Inside the Actors Studio, leading to a discussion of organ donation. From Karl's diary: A news report from India about an elephant who had a giant pair of slippers, and Karl's belief that scientists should give up trying to kill germs because it will only make them stronger and bigger.
When an animal rights activist working undercover at a farm goes missing, Allison befriends a pig that could hold the key to the woman's whereabouts. Also, Joe's special birthday gift from Marie leaves him wondering how she was able to obtain it.
A motorcycle accident and a small plane crash provide new patients for the Alpha Team, while they wait to hear news about one of their own.
The trial of The Gravedigger hits close to home for members of the team, and everyone at the Jeffersonian must work overtime to uncover the forensic evidence to elicit a conviction.
Semi-final battles at the Grand Festival. With Nando vs Zoey. Then Dawn vs Jessilina.
Maya and her unborn baby are fighting for their lives on the operating table, and Addison, Amelia and Fife try everything humanly possible to save them. Meanwhile, Sam operates on an incoming crash victim and later makes a grim discovery; Cooper makes an ill-timed but valiant effort with Charlotte, and the staff’s world gets rocked by an unexpected death.
Mark continues his interrogation of Hellinger in a desperate attempt to find out when the next blackout will occur. Demetri must choose between helping Janis and Simon break into NLAP to stop the blackout from occurring, or turning the fugitive Simon in to the FBI. Elsewhere, Lloyd finds the common denominator that can help him solve the complex equation he was working on in his flashforward.
An elderly patient admitted into the E.R. for a heart condition sees a familiar face, a long lost love who happens to be in the E.R. as well for a fractured arm, and the staff find themselves caught up in their love story. Meanwhile, Karev treats a troubled teenage patient (guest star Demi Lovato) whose parents brought her in for schizophrenia, and Meredith can't help but tell Cristina about her suspicions of Owen -- which inevitably messes with Cristina's head.
The ladies bask in some fun in the sun when Ramona organizes a "renewal getaway." Still stung from her loss, Bethenny is comforted by the ladies---until Kelly kicks up some drama. Meanwhile, LuAnn tunes up in the Big Apple by recording a song in the studio.
The CSI team must investigate one of their own when Langston is accused by a former colleague of being part of the Dr. Jekyll murders, on part one of a two-part season finale of CSI.
Jack becomes even more entangled in his love triangle between Avery Jessup and Nancy Donovan, and he turns for advice to Liz, who is focusing on her own romantic problems. When Liz can't find a date to Floyd's wedding, she revisits her old boyfriends in hope that a spark will reignite. Meanwhile, Tracy continues his journey to earn his egot.