David discovers that Roth has given the world's most powerful leaders the stem cell treatment that he now knows leads to violent paranoia; while investigating a mysterious outbreak in Moldova, Carlos uncovers a horrific act of atrocity.
Justin casts a spell on himself to impress a girl, and ends up being the baseball team's star pitcher. When Alex finds out, she uses it to become the catcher's "good luck charm".
Chris is disappointed when he finds out that Greg will be going to a different high school next year. He tries to get the necessary grant money so he can afford to go to Greg's school. Rochelle volunteers Drew to be Tanya's dance partner in Swan Lake after her ballet partner gets hurt.
Disguised as Spider-Man, the Chameleon embarks on a crime spree that can only be stopped by Spidey and the Black Cat -- together.
The Doctor and Donna's meet Agatha Christie at a manor owned buy Lady Eddison. When Agatha Christie goes missing and a body turns up in the library the adventure turns into a pulp sci-fiction murder mystery, with a murder, a jewel thief, and a wasp alien. Can they solve the mystery?
When the AllSpark turns construction vehicles into Autobots, Bulkhead becomes fast friends. However, the Decepticons have other plans in mind.
Malek is devastated by Gerd's death. Joseph is worried about Malek and tries to stay close, remaining within the city. However, a security camera captures his transformation, and subsequently XAT learns his true identity.
Gwen's older brother, Ken, is suddenly missing. As they look, they encounter a surprise leading to a shocking secret from the DNAliens.
President Roslin faces challenges as the Colonials plot with Cylon rebels to destroy a Resurrection Hub.
In the season finale, Don and Charlie work together on a case that ends up with them going head to head about their personal beliefs, and one team member will walk away forever.
Mick and Beth face the ultimate consequence of a relationship between mortal and immortal when a vampire kills a human in the heat of passion. But when the murder investigation threatens to expose vampire identities, Mick and Josef take action.
Jeremy finally runs out of money and finds himself on a downward spiral of hunger, homelessness and criminality. Meanwhile Mark needs to find a girlfriend before his birthday party.
After ramming one Evo, a criminal causes chaos by driving up a one-way street in the wrong direction. But this hapless hooligan is not prepared for the force’s secret weapon – Stinger.
Mark Chang is called back to the planet Yugopotamia to become King when Princess Mandie sizes the throne from his father, and Timmy has to get help from Vicky to save Mark and his people.
After Mel and Madge's romantic evening stroll on the beach is very rudely interrupted, what is supposed to be the most memorable day of their lives - proceeds to become memorable for all the wrong reasons.
Melinda discovers the truth about her family's past through a series of bodily possessions.
A mobster that Warrick had a run-in with is found dead, and Warrick is found at the scene with the murder weapon. However, he insists that he has no recollection of the crime.
When a drunk patient is admitted to the ER, his actions endanger everyone at County. Pratt is still pursuing his dreams of becoming Chief of the ER, and Gates is worried about his future with Sam. Luka unexpectedly runs into Dr. Moretti.
Dawn beats Kyle and May beats Zoey in the semi finals and both have to battle in the finals. In the finals, Dawn faces-off against May in the Wallace Cup. Dawn uses Piplup and May uses her Glaceon. Dawn manages to narrowly defeat May's Glaceon by a fraction. After the contest ends, Dawn earns her second Ribbon! Now that the contest is over, May departs from Ash, Dawn, and Brock once again and goes back to Johto.