The host performs experiments to demonstrate specific scientific principles related to selected scientific fields, including biology, chemistry and physics.

A device that lets people open doors with no hands; a girl introduces a harness that holds children during swimming lessons so they can learn technique safely.

The hosts explore a wide range of topics, from history and critical inventions to natural wonders and science in a quest to find all the answers.

An expedition throughout the animal kingdom with the goal of investigating traits and characters that are unique to different animals.

Philadelphia residents cope with flooding from a large tropical storm; a man faces a life-or-death situation while in a submerged car.

Rescuers hope to save a family trapped underground in the wake of a tornado; a twister destroys a family home.

Ma Parker and her entire mob family come to town and disrupt a Mother of the Year Ceremony and rob the entire wealthy audience of their cash and jewelry.

Ma Parker has assembled a gang while inside prison, and Batman and Robin must find a way to get inside so that they may be able to disband the vicious gang.

A scientist uses her unusual abilities to take control of insects to prevent a deadly pesticide from being made and distributed; she threatens a billionaire.

An eccentric scientist engineers an electronic brain, which a conniving criminal intends to use in planning a series of robberies.

After the members of a scientific expedition go missing, Clark takes Lois and Jimmy with him on an adventure through a treacherous jungle.

The owner of a diner makes headline news when he makes false claims of having a personal friendship with Superman, who is forced to rescue him.

A circus clown plots to subdue a fellow clown, assume his identity by way of costume, and proceed to rob a telethon that is being sponsored by the Daily Planet.

Walker takes control of an expert task force that is charged with tracking down a dangerous computer hacker who is targeting Federal agents.

Walker and his fellow task force members continue in their efforts to bring to justice notoriously deadly computer hacker "The Chairman."

Members of Walker's task force are targeted for death by a group of skilled assassins hired and controlled by ruthless arms dealer.

A frightened young mother abandons her child and Alex is stricken with baby fever; Rangers are on the tail of a gang of murderous ex-convicts.

A desperate grandmother asks the Rangers for their assistance when the ambulance carrying her granddaughter's donor liver is hijacked.

A ghost from the past returns with a shocking surprise for the team; Cordell must come to terms with the decisions he's made and the effect he's had.

Liam, Stella and the horse rescue are excited for opening day; the boys go off on a camping trip as the ladies plan for a relaxing spa day.

When Spock must return to his homeworld in order to complete a mating ritual, he and Kirk are forced to fight a battle to the death.

The enigmatic Q pits the crew of the Enterprise against a terrifying enemy that resembles Napoleon with the face of a boar.

Kira and Dr. Bashir end up in a universe with alternate versions of people they know, and must involve themselves in a dire political situation there.

After having a brief love affair with a member of the Varo species, Kim becomes biochemically dependant on her and he cannot live without her.