Aryanna and Sherlon

8 p.m. on KBFX 9-1-1

There may be no “La Brea”style prehistoric critters involved, but Bobby (Peter Krause) and his 118 crew mates spring into action after an abandoned oil well suddenly erupts, causing a massive sinkhole in downtown Los Angeles, in the new episode “Past Is Prologue.” Elsewhere, Athena (Angela Bassett) investigates a 20-year-old cold case involving a casino robbery, while Buck (Oliver Stark) frets that his relationship with Taylor (guest star Megan West) may be on life support. Meanwhile, Hen (Aisha Hinds) meets a man from her mother’s (Marsha Warfield) past.

9 p.m. on TLC Love in Paradise: The Caribbean, A 90 Day Story

This latest series spinoff in the “90 Day Fiancé” franchise plays out against a Caribbean backdrop and focuses on four frayed relationships in various degrees of peril, including a holiday romance that turned into a pregnancy. That drama-heavy connection involves 25-year-old Aryanna, who is heading to Jamaica for a hopeful reunion with Sherlon, whom she last saw on a whirlwind vacation that left her a motherto-be. Now she’s determined to solidify this relationship, but her “beloved” is more excited about his new job at a resort for swingers.

9 p.m. on Showtime Wakefield

James (Dan Wyllie) suffers a loss of identity that sends him reeling into a near-fatal overdose in the new “Episode 5.” Meanwhile, Tessa (Bessie Holland) is devastated after learning her mother disposed of all her belongings. Elsewhere, Linda’s (Mandy McElhinney) attempt to win over her colleagues goes awry when she takes the advice of a Tinder date. Rudi Dharmalingam and Geraldine Hakewill also star.