20/20: In an Instant / 9:00pm (7) Back for another summer, this series combining first-person accounts of true survival stories with dramatized sequences resumes with “Whiteout.” The saga of Jim and Jennifer Stolpa was told in a 1994 TV movie that starred Neil Patrick Harris and Kelli Williams, but here, actual participants discuss dealing with a Nevada blizzard that stranded the couple and their infant son for eight days.
The Son / 9:00pm (AMC) 10:02pm (AMC) 2:02am (AMC) The family saga reaches the penultimate episode of Season 1 with “The Prophecy,” which flashes back to 1849 to recall how Young Eli (Jacob Lofland) once was forced to place his trust in an unexpected ally just to survive. In the 1915 “present” of the story, Eli draws upon his past to find his way toward a choice that ultimately puts him at odds with Phineas (David Wilson Barnes).
MOVIE “Destination Wedding” / 9:00pm (Hallmark) After months planning her sister Mandy’s (Andrea Brooks) destination wedding, Ellie’s (Alexa PenaVega) delight as the guests start to arrive gives way to dismayed horror as she realizes the bride and groom are MIA for their own wedding. Moreover the groom’s best man is Ellie’s ex, Greg (Jeremy Guilbaut), although he readily pitches in to
help avert what is shaping up as a disaster in this 2017 romantic comedy.
Class / 10:00pm (BBC) 1:00am (BBC) The season finale, “The Lost,” finds the formerly tightly knit students shaken and splintered apart by their time in detention. They must reunite, however, when the Shadow Kin return to Earth, led by Corakinus (Paul Marc Davis), who is determined to claim both April’s (Sophie Hopkins) heart and the Cabinet of Souls.
Mountain Monsters / 10:00pm (DEST) 1:00am (DEST) Buck makes contact with the eerie little girl at the Three Rings, but she abruptly vanishes. Meanwhile, the AIMS team follows Jeff to a mysterious cabin where he suspect they’ll find clues revealing what the other team is doing in the forest. A shocking discovery about the little girl leads Buck to a secret garden, where he has a face to face encounter with the Woman of the Woods as the show ends its current season tonight with the new “Episode 8.”
Alexa PenaVega stars in “Destination Wedding” on Hallmark Channel.