PANDORA 8 p.m. on CW. This new series recalls the CW adventure “The Outpost,” albeit with a sci-fi twist. Set in 2199, the show is about Jax (Priscilla Quintana), who, after losing her parents in an attack, enrolls in the Fleet Training Academy on Earth to become a guardian against intergalactic threats. She befriends human and alien students, and learns that everything she knows about her past is a lie.

BEHIND CLOSED DOORS (2019) 8 p.m. on HBO; stream on HBO platforms. In 2008, Aarushi Talwar, 13, was found dead in her home in northern India. The police initially suspected the killer to be the family’s live-in servant, Hemraj Banjade. But when his body was found on the Talwars’ roof days later, officers set their eyes on Aarushi’s parents. The story gripped India for years and even spawned a feature film. India’s Central Bureau of Investigation tried to close the case, citing insufficient evidence, but a special judicial magistrate later charged the parents with murder. They were convicted but have since appealed the verdict. This new two-part documentary tries to recap the timeline of events and highlight how class divisions may have thwarted the search for the truth.

EX ON THE BEACH 8 p.m. on MTV. In this chaotic reality show, back for a third season, 10 single reality TV stars arrive at a beach in search of romance, knowing that their former partners will intrude at some point. That inevitably leads to yelling matches, a rekindling of old flames, or both.