“The Terror,” released in 1963, is the product of Roger Corman & Francis Ford Coppola, with contributions from others, and features Jack Nicholson as a young officer within Napoleon’s Army. He becomes captivated by an intriguing woman (Sandra Knight) he encounters along the Rhine Confederation's coast. Following an encounter with a witch (Dorothy Neumann), his pursuit leads him to the castle of an elderly Baron burdened by guilt (Boris Karloff). A noteworthy detail about the film’s creation is that after filming concluded for Corman’s “The Raven,” the castle sets remained standing for a short time before demolition. Corman swiftly created a script with Leo Gordon and brought in 75-year-old Boris Karloff, who had previously appeared in “The Raven.” Karloff later commented on how Roger hurried around with him and the other actors, filming scenes just ahead of the demolition crew. After several days of shooting, Corman was unable to direct the rest of the film himself due to union regulations, so he brought in various young filmmakers to help, including sending Coppola to the Big Sur area for eleven days. Sets from other American International Pictures (AIP) films were also incorporated, most notably “The Haunted Palace” with Vincent Price. I’ve heard some people express concerns about the story's coherence, but I didn’t find the plot difficult to understand; in fact, I had it figured out by around the midpoint, aside from a questionable twist near the conclusion (you’ll recognize what I mean). As my title suggests, “The Terror” has similarities to Hammer films, though it was filmed in California and with a smaller budget than most Hammer productions. If you appreciate atmospheric Gothic horror featuring mysterious castles, ghosts, and witches—similar to those found in Hammer films—then you’ll likely enjoy "The Terror." It particularly calls to mind “Dracula, Prince of Darkness” (1966), which was released three years later. The film's spooky atmosphere from the 1960s is excellent, including the Gothic score by Ronald Stein. One noticeable drawback is Nicholson’s voice, which feels out of place at times and his delivery can be awkward, but that’s a relatively small issue. The movie has a running time of 1 hour & 21 minutes and was filmed in Los Angeles (studio), Santa Monica, Point Lobos & Palos Verdes Peninsula, California. The writers were Gordon and Jack Hill. Additional cast members include Dick Miller (Stefan) and Jonathan Haze (Gustaf). My rating is a B/B-.

Source on TMDB