Like the 1991 film, “Don’t Tell Mom the Babysitter’s Dead” follows 17-year-old girl Tanya (Jones), who plans to vacation in Europe with her friends before heading to college in the fall. But her mom (Ms. Pat) decides to go to a wellness retreat in Thailand, so Tanya is forced to stay home with her siblings. When — as the title suggests — their elderly babysitter (Squibb) unexpe...