The season finale of “Once in a Lifetime” features a story ripped from the headlines of 1990. It’s a tale as old as time. Married teacher & her student fall for each other. Married teacher asks student to kill husband to make her do her wedding vows, because divorce is messy with untended consequences. Before she won her Oscar, Helen Hunt appeared in this Lifetime original movie that hit the cable TV airwaves just a few months after the televised courtroom drama ended. The source material is tragic. This movie is a tragedy.