Karen Black and Russ Tamblyn will star in Unapix Films’ family crime caper, “Invisible Dad,” which begins production January in L.A.The film is produced by Ashok Amritraj and Andrew Stevens and directed by Fred Olen Ray. Exec producers are Unapix president Robert Baruc, Pablo Dammicco and Stefano Dammicco. On a camping trip, a boy and his father discover an alien object that causes whoever is exposed to it to become invisible. Dad then uses his new powers to thwart a sinister plot by his co-workers. ‘Fool’s’ venture Unapix also is currently co-producing with the Image Organization “Fool’s Gold” starring Anthony Michael Hall (“Edward Scissorhands”), Cynthia Geary (“Northern Exposure”), Wes Studi, Charles Rocket and Priscilla Barnes. Described by Baruc as ” ‘Shallow Grave’ in the Rockies,” the film follows three campers and a tour guide on a mountain expedition who stumble across the remains of an airplane crash with no survivors and a cache of gold bars. Directed by Kurt Anderson, the film is produced by Richard Brandis and exec produced by Baruc and Image’s Pierre David. ‘Grim’ project Also on the Unapix slate is video title “Grim II,” starring the U.K.’s Samantha Janus. Produced by Liz Matthews and directed by Paul Matthews, the film begins lensing in January on the Isle of Man in the U.K. Unapix will retain North American distribution rights to all three titles, which are scheduled for release in the fall of ’97.