Channel 4

Countdown begins with a suspicious murder in broad daylight, leading Los Angeles Police Department officer Mark Meachum to be recruited to a secret task force of undercover agents from all branches of law enforcement that will investigate the death. But as the truth of a more sinister plot comes into focus, the team must overcome their conflicting personal agendas to unite and save a city of millions.

The Price is Right, originally hosted by Bob Barker until 2007 and Drew Carey thereafter -- features a wide variety of games and contests with the same basic challenge: Guess the prices of everyday (or not-quite-everyday) retail items. Four contestants, all of whom are seated in one of the wildest audiences in daytime game-show history, are called to the stage to play a preliminary pricing round. That winner joins the host on stage for one of more than 70 different pricing games. After three such games, the contestants spin a big wheel -- hoping to get as close to $1 as possible -- in the "Showcase Showdown". The two highest winners of that round advance to the final, where prizes could be cars or roomsful of furniture. A trio of models presents the prizes.

Ironheart follows Riri Williams, a 15-year old engineering genius attending Massachusetts Institute of Technology. Riri builds a suit based on Iron Man's armor and takes up the name Ironheart.

A year after witnessing a traumatising attack in her neighbourhood, Hannah, a young wheelchair user, views a copycat attack on her area's CCTV system. The attacker enters the area with an unknown woman, but emerges alone, and Hannah believes she was murdered despite there being no evidence of a crime.

Common Side Effects  follows former high school lab partners Marshall and Frances who begin to unravel a conspiracy involving big pharma and the federal government to suppress knowledge of a rare mushroom that may hold the key to curing all the world's diseases.