First the fall finale of The Walking Dead – Beth dies in the standoff at the Grady Memorial Hospital between Dawn’s group and Rick’s group. Both Emily Kinney and her character will be missed Beth was a sweet soul who’s singing made the apocalypse seem a bit less dire.
Then on Sleepy Hollow, Captain Frank Irving (Orlando Jones) dies trying to save both Ichabod (Tom Mison) and Abbey (Nicole Baharie) from War - one of the 4 horsemen of the apocalypse. I suspect he will continue to be on the show but as one of War’s henchmen now that his soul was sold to Henry (aka War).
Finally on Downton Abbey (I'm only on season 2) – William Mason (Thomas Howes) dies from injuries sustained trying to save would-be heir to Downton Abbey Mathew Crawley during trench warfare in WWI.