8 p.m. (Ch. 7) Extreme Weight Loss

The widow of a military veteran who took his own life seeks a physical makeover in the new episode “Melissa.” Her husband had returned from Afghanistan with PTSD, a condition that also affects one of the couple’s two sons. After asking Heidi Powell for help, Melissa starts a journey that proves emotionally taxing as well as physically demanding for her. Chef Rocco Dispirito provides Melissa with nutrition tips.