Zod and his soldiers release a virus into the air that turns humans into zombies. The only way to stop it is to make an antidote from the blood of another Kryptonian. After Lois is infected, Chloe pleads with Clark to donate his blood to stop the epidemic, even though it risks outing him to Zod.
When Allison's friend with cancer suddenly dies she suspects a hospital employee may be at fault. Meanwhile, Bridgette writes a story that closely follows what later happens at Joe's job interview.
The SRU are called in to contain a riot at a maximum-security prison and begin to suspect it's all a cover for a daring prison break.
Modern society's evolution involves stem cells, gene therapy, transplants, and cloning, but also exposes the existence of monsters that hold the key to our race's future.
Justin becomes fed up with Alex constantly going through his stuff and creates a female monster to guard his room and to think like Alex. However Justin's plan backfires when the monster and Alex become fast friends.
Mick manages to upset Janice on a trip to the waterfalls of Callosa leaving their relationship in the balance. Martin ends up running through the water naked when Brandy plays a joke on hm. Noreen starts to think that her son is gay.
A messy family reunion ensues after Eli's father suffers from a heart attack. Eli also has a reunion with his mother who has been unable to cross over for ten years
Mark discovers that Jeremy's girlfriend Elena has a guilty secret. But should he tell him when Jez is clearly so happy In addition to this, Alan Johnson offers Mark the chance to go into business with him. Mark, while reassuring himself that this is his dream offer, begins to see Johnson in a new light. Big Suze inadvertently brings Mark and Jeremy's problems to a head
A rash of apparent suicides takes a sinister turn when a gambling connection is uncovered. Elsewhere, Charlie worries when Alan's retirement disappears, and Larry flounders trying to find his new path.
The DA's office is forced to tackle an embarrassing case involving domestic terrorists, the explosion of a synagogue with materials supplied by the police, and an informant who may have been lying all along to keep out of trouble.
An alien girl asks for Ben's help to end a war that's lasted for years.
A new HMO restriction on individual therapy forces Monk to join one of Dr. Bell's groups just as its members are being murdered.
Shawn and Gus are hired to protect a guy who thinks he's a werewolf and find there's more to his story than they thought.
With the ship out of FTL for twelve hours, Lt. Scott, Sgt. Spencer, Ian, Dr. Rush and others travel down to the planet to find the minerals necessary for the scrubbers to provide them with breathable air. They find a desert planet that should have what they need but they will have to locate a dried lake bed as it will be the likely source. Scott recalls some of his troubled past. As time winds down, some of the team decide to use the gate to transport themselves to a habitable planet, despite Ian's advice to the contrary. Chloe Armstrong communicates with her mother ...
A visit at his daughter's murder site leads Ben forward in his investigation. Eddie undermines Bo's authority in Tyler's eyes. Seth is missing, looking for a sign of his purpose on Earth.
The comical seafaring adventures of a young, enthusiastic boy, his pirate captain mentor, and the talking whale that raised him from birth.
Nikki's had enough - she quits Khaki Barn, for good this time! Only problem is, there aren't any other jobs available at the mall except at a new kitchen cooking & accessories store, Counter Measures.
Violet's emotional reaction to her attack has all her friends on standby alert, afraid she'll freak out. Addison makes no effort to ease tensions between her and Naomi, while the practice tries to deal with a woman they feel is covering up something when her husband shows up at the hospital with a stab wound.
Leslie is nervous about her first date with Dave, so Ann takes her on a practice date to help her prepare. Meanwhile, after a local councilman is caught up in a sex scandal, Tom, Ron, April and Mark decide to see who can uncover the worst dirt on each other.
When Meredith and Lexie's father, Thatcher, returns to the hospital with a failed liver, it's up to Meredith to save his life. Meanwhile, Izzie empathizes with a patient riddled with tumors, as Mark, annoyed with Cristina's competitive zeal, tricks her into assisting on an unusual surgery.