Ghostbusters: Afterlife (Sony, Blu-ray or DVD, PG-13, 123 min.). “Ghostbusters: Afterlife” is director Jason Reitman’s love letter to his father, director Ivan Reitman, and the elder Reitman’s original 1984 film. In fact, the film is filled with both obvious and hidden references to the earlier film, including some cameos that become a major part of its climax. However, the film also offers a new generation of young Ghostbusters.

The film begins with the story of Callie (Carrie Coon) and her children, Trevor, 15 (Finn Wolfhard of Netflix’s “Stranger Things”), a bit sullen but a mechanical whiz, and genius-level Phoebe, 12 (Mckenna Grace), who are eventually joined by Phoebe’s new classmate Podcast (Logan Kim) in their ghostbusting adventures. No longer able to afford the rent, Callie takes her kids to live in the rundown farm she just inherited. While just who her father was is hidden for a long time, it soon is evident he was one of the original Ghostbusters, as Phoebe finds a ghost detective device and Trevor uncovers one of the Ghostbuster vehicles (coolly equipped with a new breakout gunner’s seat).

Their new town in Oklahoma is subject to a lot of earthquakes, which mystifies science teacher/seismologist Grooberson (Paul Rudd, aka Marvel’s Ant-Man). When Grooberson recognizes the ghost trap, he works to open it, releasing a ferocious ghost which heads towards the old mine in the mountain, which eventually is revealed to contain a Sumarian temple to Gozer. Meanwhile, Podcast has filled in Phoebe about the Ghostbusters’ 1984 efforts in New York City, some of which they watch on YouTube.

The most fun is when the spirit of the Stay-Puft marshmallow man is back, but this time in the form of a bunch of adorably evil, mini-marshmallows who wreak havoc at a Walmart to Grooberson’s dismay. The ending is typically over-the-top, but watchable goofiness.

Extras include looks at how the film came to be (19:50), the equipment (6:12), creating the ghosts (6:29), the Ecto-1 car (4:490, the Easter eggs (7:49), a deleted scene and two sit-downs with Ivan Reitman and three cameo performers (14:21 total). Grade: film and extras 3.25 stars

Rating guide: 5 stars = classic; 4 stars = excellent; 3 stars = good; 2 stars = fair; dog = skip it

The Unhealer (Scream Factory, Blu-ray or DVD, NR, 93 min.). This is another teen-centered, science fiction-inspired film, but one that tackles the serious issue of bullying. Elijah Nelson plays Kelly Mason, who lives in a trailer with his single mom Bernice (Natasha Henstridge of the “Species” films). Kelly is constantly bullied by a group of four male students who call him trash boy. Kelly has an eating disorder that makes him want to eat paper, pencils and other unhealthy stuff.

When Bernice encounters huckster healer Rev. Pflueger (Lance Henriksen of “Aliens”), she brings him to help Kelly. In the process, the mystical healing powers that Plueger had obtained from an ancient Navajo grave are passed to Kelly, who not only gets better, but also quickly realizes that whatever is done to him likewise happens to the doer. Kelly then uses his newfound powers for revenge against his tormenters, who have upped their game in deadly fashion.

Adam Beach plays Sheriff Adler, also Navaho and sympathetic towards Kelly, while Branscombe Richmond is the shaman Red Elk, who is trying to get the healing powers back. Chris Browning plays Coach Gus, whose two sons are among Kelly’s tormentors. One of the sons, Reed (Gavin Casalegno, who, in an extra, says he was bullied in middle school), begins to regret his bullying ways and tries to temper the other bullies’ actions.

There is fun as Kelly tries out his new powers and has his classroom daydream affect two other students, but soon things turn more brutal and deadly. The film, directed by Martin Guigui, is very entertaining. Extras include brief interviews with 10 cast members (17:51), seven deleted scenes (5:18), five alternate/extended scenes, including a romantic one (7:29), a gag reel (3:10); a behind-the-scenes montage (2:38) and a slideshow (3:02). Grade: film 3.25 stars; extras 3 stars

Stage Fright (1950, Warner Archive, Blu-ray, NR, 110 min.). Director Alfred Hitchcock went back to England to film this theatrical story of murder and misdirection. All the acting is wonderful, down to the smallest parts. Marlene Dietrich plays actress Charlotte Inwood (she sings four songs, including Cole Porter’s “The Laziest Gal in Town,” which became a staple of her shows), whose murder of her husband is being covered up by would-be boyfriend Jonathan Cooper (Richard Todd), who now is on the lam from the police and seeking help from friend Eve Gill (Jane Wyman, fresh off winning an Oscar for “Johnny Belinda”), an acting student. The audience soon comes to realize Jonathan is an unreliable narrator.

In her efforts to help Jonathan, Eve decides to go undercover as Charlotte’s new, temporary maid, replacing Nellie (Kay Walsh). In doing her investigating, Eve meets Detective Inspector Wilfred “Ordinary” Smith (Michael Wilding) and starts to fall in love. Eve’s parents are wonderfully played by Alastair Sim and Sybil Thorndike. Joyce Grenfell is memorable as the woman manning the arcade shooting gallery.

The extra is a documentary on Hitchcock and the film, which features brief interviews with Wyman and Patricia Hitchcock, the director’s daughter, who has a cameo as Chubby Bannister. Hitch himself passes Eve on the street in his cameo. Grade: film 3.5 stars; extra 2.5 stars

Song of the Thin Man (1947, Warner Archive, NR, 86 min.). The sixth and final film with William Powell and Myrna Loy as married amateur sleuths Nick and Nora Charles is the least satisfying of the films, practically stolen by dog Astra’s numerous sneakings into the bed of Nick Jr. (Dean Stockwell, who would go on to 1984’s “Dune” and TV’s “Quantum Leap” among his 204 acting credits).

Gloria Grahame (Oscar winner for “Crossfire” and future winner for “The Bad and the Beautiful”) plays singer Fran Ledue Page, who has more than one man after her affections. One of them (Phillip Reed as band leader Tommy Drake) is shot aboard the gambling boat she is performing on, and the clarinet player (Don Taylor as Buddy Hollis), a would-be beau, has to install himself in a mental care facility. As they try to solve the crime, Nick and Nora are taken to a series of after-hours jazz jam sessions by jive-talking Clarence “Clinker” Krause (Keenan Wynn). Astra also makes off with a key piece of evidence, hiding it in Clinker’s music case.

Extras are a John Nesbitt short starring Stockwell as a boy who learns to live up to his mistakes and a classic Tex Avery cartoon, “Slap Happy Lion.” Grade: film 3 stars; extras 2 stars