What To Watch Sunday: Lioness Wraps, Best Medicine Returns, Jon Hamm In American Hostage, And More

On TV this Sunday, several new shows and series begin airing. The third season of "Lioness" concludes, with Kyle's chase leading to deadly consequences and Joe uncovering a larger plot in the finale. The Milwaukee Brewers face the Baltimore Orioles in an MLB game. A mermaid appears in Port Wenn, causing chaos and commotion among the townspeople.

Season two of "Best Medicine" premieres, featuring a mermaid wash-up and Judith causing havoc while on prescribed oxygen. Jon Hamm stars in "American Hostage," where he leads a hostage taker in an interview on his program. In a documentary, Lee reflects on her life and career challenges. A series premiere introduces an Indianapolis radio reporter played by Jon Hamm, who faces a life-or-death scenario during a hostage situation.

The series also stars Mireille Enos, Kristoffer Polaha, and William Jackson Harper. Vanessa Lachey hosts a look back at memorable VMAs moments. A six-part docuseries follows the chef, restaurateur, and author on his no-frills road food adventure. John encounters Saddam Hussein, and the Insurgents resume their attacks. The investigation into Hal Jordan's death intensifies, with Atticus Pund closing in on his prime suspect.

A young Catholic schoolteacher in 1975 Northern Ireland becomes entangled in a dangerous affair with an older, married Protestant barrister. Creator Sharon Horgan stars in a series premiere as a 50-year-old divorcee seeking love while caring for her ailing parents and a son who is not yet grown up. Curtis attempts to bring joy to a low-spirited country through synthetic beings designed to spread cheer.