Seen list (Series episodes)

Dr. Horrible is an aspiring super-villain with a plan for world domination. He also has a crush on Penny, a girl he met at the laundromat. There, he accidentally makes her meet his arch nemesis Captain Hammer whom she falls in love with.

Penny seems to be smitten with Captain Hammer who's true nature begins to reveal itself: He might not be as into doing good for the right reasons but more for selfish ones. Dr. Horrible decides that he must get rid of Captain Hammer.

Dr. Horrible invents a death ray which he plans to use on the superhero at the unveiling of a new Captain Hammer statue. Penny is torn between the hero and the villain, realizing that she may have feelings for Horrible.

Prime Minister Michael Callow faces a shocking dilemma when Princess Susannah, a much-loved member of the Royal Family, is kidnapped.

In the near future, everyone has access to a memory implant that records everything they do, see and hear. You need never forget a face again - but is that always a good thing?

War vet Dr. John Watson returns to London in need of a place to stay. He meets Sherlock Holmes, a consulting detective, and the two soon find themselves digging into a string of serial "suicides."

Mysterious symbols and murders are showing up all over London, leading Sherlock and John to a secret Chinese crime syndicate called Black Lotus.

Mycroft needs Sherlock's help, but a remorseless criminal mastermind puts Sherlock on a distracting crime-solving spree via a series of hostage human bombs through which he speaks.

Sherlock must confiscate something of importance from a mysterious woman named Irene Adler.

Sherlock and John investigate the ghosts of a young man who has been seeing monstrous hounds out in the woods where his father died.

Jim Moriarty hatches a mad scheme to turn the whole city against Sherlock.

An unusual comet leaves behind 4,400 people who have disappeared over the last fifty years. While authorities are investigating, some of the 4,400 are behaving strangely.

Another one of The 4400 begins to show strange behavior. Carl Morrissey suddenly shows immense strength and the urge to remove criminals from Bradley Park to bring it back to its old state.

Baldwin and Skouris deal with returnee Oliver Knox, involved in a series of murders. Jordan Collier, hotel magnate, puts himself in front as 4400 spokesman.

Someone has leaked a list of the names and current locations of all the 4400. When several of the returnees are bombed, Baldwin and Skouris must find out who did it.

Baldwin's son Kyle has been kidnapped by agent Lytell for interrogation. Just when Tom and Diana are making plans to take him back, Maia has a premonition about Kyle being the answer to everything.

Kyle tries to visit his cousin Shawn at The 4400 Center but is thrown out. Richard and Lily are desperate to protect their infant daughter, Isabelle from Collier and other maniacs, and a schizophrenic 4400 wants a huge communicative device and makes it a hospital's project from a minor position.

A baseball player is overwhelmed by a special 4400 ability. Collier is involved with a weapons' dealer. To Maia's delight Diana's sister visits them. Richard and Lily seek shelter at a motel where Isabelle takes some surprising initiatives.

A salesman's saliva has an extremely slimming effect on people. Lily suspects a new pregnancy as Richard stumbles onto a case of jealousy. So does Collier, and Shawn is disgusted by his moral. Kyle is tempted to join a wild students' party. Maia finds her aunt's work very interesting.

Some schoolchildren get startling abilities and some parents suspect child abuse by a 4400 who is their teacher. Jordan Collier changes attitude, especially towards Isabelle and her parents. Shawn is fascinated by a young homeless girl.

Maia has a vision that frightens her and causes the NTAC serious concerns. Heidi visits her mother which makes Isabelle cry in despair. Collier sees Isabelle to get some crucial advice.

Tom Baldwin wakes up in a parallel or alternate world where he has married a woman two years ago but he has never seen her before. There is no trace of any 4400s from the future with special skills, and Jordan Collier is Governor.

After living for 8 years in an alternate world that only Tom and Alana remember the world with the 4400 has returned as it was at the second the 8 years started. A 30 year old 4400 woman wakes up and finds everybody else in her local community dead. Maia puts April's love for her to a test.

A male 4400 originally from Rwanda repairs bad chromosomes of unborn. Kyle is utterly despaired as he suddenly remembers what he did during his blackout. Richard attends a co-veteran's funeral. Diana makes a hard family decision.

NTAC is keen to find Jordan Collier's killer as Tom is desperate to find Kyle.