Four dead in Ohio

"CNN Special Report: Witnessed: The Killings at Kent State" looks back at the impactful 1970 event in which four Vietnam War protesters were killed by members of the Ohio National Guard. Reporters talk to eyewitnesses who have very different perspectives on what unfolded. 6 p.m. Sunday, CNN

Disaster from up high

Discovery Channel was planning five nights of special programming focused on a jump from Mount Everest, but the stunt was canceled after the recent disaster. Instead, producers have put together "Everest Avalanche Tragedy," a much more somber affair. 8 p.m. Sunday, Discovery

Ace of Spade

"David Spade: My Fake Problems" marks the comedian's first hourlong, stand-up special in 10 years and provides the perfect opportunity for him to explain how "Rules of Engagement" managed to stay on the CBS schedule so long. An extended, uncensored version will be made available on various digital platforms starting Tuesday. 9 p.m. Sunday, Comedy Central

Neal Justin