Duchess Satine travels from Mandalore to Coruscant on a diplomatic mission, with Obi-Wan Kenobi, Anakin Skywalker and a team of troopers to defend her. As her luxurious starship, Coronet, makes its way through hyperspace, the Jedi must stop several assassination attempts, and Anakin discovers that Obi-Wan and the Duchess have a history together.
Poison Ivy appears to have stopped her crime spree when she marries a doctor with two sons to raise. However, crimes continue occurring in the Poison Ivy style, leaving Batman to question her innocence.
Charlie begins a painful journey of withdrawal from drugs, surprisingly aided by Locke, whose true motive for helping Charlie is a mystery. Meanwhile, survivors struggle to find and free Jack when he's buried alive in a cave collapse, and someone might be secretly thwarting Sayid, Kate, and Boone when they enact a plan to find the source of the French transmission.
Ahsoka and Jedi Master Luminara escort the captured notorious Separatist leader Nute Gunray to Coruscant so he can stand trial for his crimes. However, they are unaware that Count Dooku has sent his assassin, Asajj Ventress, to free their captive. With the help of Senate Commandos, the Jedi have to thwart Ventress's efforts to free their prisoner, despite the traitorous plans of Senate Guard Captain Argyus.
Cad Bane has been hired by Darth Sidious to steal a Jedi holocron. The holocrons -- data storage systems that can only be opened through the Force -- are protected within a vault inside the Jedi Temple. Recruiting a changeling posing as a Jedi in his plot, Bane infiltrates the building's security systems and leads Anakin, Obi-Wan and Ahsoka on a chase.
Aging billionaire Grant Walker breaks Mr. Freeze out of prison so he can use the scientist's knowledge to can gain immortality and cover the world in a new ice age.
Lyle Bolton, Arkham's former chief of security, becomes the vigilante Lock-Up and kidnaps Commissioner Gordon and Mayor Hill, seeing them as the cause of rampant crime in Gotham City.
Spider-Man accepts Nick Fury’s offer to become the Ultimate Spider-Man and meets his new allies of young heroes consisting of Nova, White Tiger, Power Man and Iron Fist. Meanwhile, Norman Osborn orders Doctor Octopus to send the Frightful Four to target Spider-Man. Spider-Man ends up having to get help from his new allies to fight off the Frightful Four.
Harley Quinn has broken off with the Joker and teams up with Poison Ivy. Together they wreck havoc on Gotham and now Joker wants a piece of the action.
When District Attorney Harvey Dent is poisoned after a dinner date, Batman makes the horrifying discovery that his date was Poison Ivy, a plant-obsessed villainess.
"Heart of Ice" is the best rated episode written by Paul Dini. It scored 8.5/10 based on 35 votes. It was directed by N/A. It aired on 9/7/1992 and is rated 0.1 points higher than their second-best episode, "Trial".