Questions About Redstone’s Health Re-Emerge in Battle Over CBS

Questions about Sumner Redstone’s health are once again at front and center as lawyers for CBS Corp. and the billionaire’s company prepare for a trial in their wrestling match over control of the U.S.’s No. 1 prime-time TV network.

CBS wants a Delaware judge to bar National Amusement Inc. from offering testimony about Redstone’s role in fighting directors’ efforts to strip his family of its controlling interest in the media company. A hearing is set for Aug. 8.

The directors, led by Chief Executive Officer Les Moonves, say 95-year-old Redstone’s health problems are so acute that he is “incapable of ...