What’s Worth Watching: ‘Greenleaf’, ‘Supernature-Wild Flyers’, ‘Sharks Vs. Dolphins’ and more for Wednesday, June 29

Greenleaf (10/9c, OWN): Never underestimate the power of Oprah. This sudsy new drama, in which Oprah Winfrey plays a supporting part, scored OWN’s best numbers in its double-barreled premiere a week ago. Settling into its regular weekly time period, the story takes a provocatively topical turn when the mayor asks the Bishop (Keith David) and the Calvary church to take a stand supporting a cop who shot and killed an unarmed teen. This could cause a rift in the church and in the Greenleaf family, when young Sophia (Desiree Ross) defiantly joins a protest championing the victim. And blackmail rears its ugly head as Grace (Merle Dandridge) is presented with dark truths about her late sister’s past.

Supernature — Wild Flyers (8/7c, PBS, check local listings at pbs.org): PBS takes flight in a stunningly photographed three-part series explaining the science of “Defying Gravity,” the opening episode’s title. The premiere explores basic principles of flight while spotlighting the likes of flying squirrels, flying fish, vultures, duck chicks and (something new to me) paradise tree snakes.

Sharks Vs. Dolphins: Face Off (10/9c, Discovery): A more dire nature story unfolds in a Shark Week investigation of the often contentious relationship between sharks and their sometimes prey, the dolphin. Preceded by Deadliest Shark (9/8c), which asks if the elusive oceanic white tip shark indeed lives up to that billing.