Political comedy drama Battleground, which marked Hulu's first foray into original programming, is returning for a second season, over five years after its launch. However, it is not returning to the small screen, but rather has been adapted into a British podcast. There have been a raft of podcast-to-TV adaptations, including Amazon's forthcoming Julia Roberts-fronted, Sam Esmail-directed remake of Homecoming, but this is thought to be the first TV series that has moved…