A good season finale should leave you fighting for breath, yelling at the TV screen and dreading the cold turkey void that stands between the end credits and more episodes.
The best writers and showrunners know how to leave fans on tenterhooks and will use every trick in the book to ensure the wait for resolutions is agonising. Cliffhangers, unanswered questions, and enduring mysteries are the tools of their trade.
Many of the biggest shows of the previous broadcasting season signed off on this note and now have their work cut out delivering satisfying conclusions to the compelling story arcs they left incomplete.
The same is true of the classic shows that are plotting a revival in 2018. After so many years, these golden oldies have questions to answer about the lives of their characters during the long wilderness years, and must justify why they're back on our screens.
From cliffhangers that must be addressed pronto, to age-old mysteries that are about to return to the fore, here are the burning issues that must be resolved on the small screen over the next 12 months.