Undercover Grandpa (2017) on Netflix

Plot summary

Jake Bouchard, a shy seventeen-year-old, and his friend Wendall have been trying to get him a date with Angie Wagner. She agrees to go with Jake to an upcoming party, but his parents insist he stay home that evening for dinner with Grandpa Lou, who fills the meal with dubious war stories and sees enemies everywhere. Then Angie is taken, and no government office will help. Grandpa Lou is a retired intelligence officer, and his accounts were true. He gathers Wolf, Harry, Mother and Giovani, the old unit known as the Devil's Scum, while Jake brings in Wendall for his skill with computers and cell phones.