Highlander 2: The Quickening
In the year 2024, the ozone layer is accepted to have been annihilated. It is up to MacLeod and Rameriz to fix things. Resistance originates from both the planet Ziest (MacLeod and Ramirez's homeworld) and an enterprise benefitting from the alleged absence of ozone. Additionally, flashbacks show the story behind MacLeod and Ramirez's outcast from Ziest.