"The Night Strangler" was screenwriter Richard Matheson's sequel to "The Night Stalker," completed in Aug. 1972, only seven months since the original was broadcast, Darren McGavin returning as intrepid reporter Carl Kolchak, Simon Oakland also back as his 'bilious grouch' editor Tony Vincenzo. Instead of a modern day vampire on the loose in Las Vegas, Matheson recalled a tour of underground Seattle, the ruins of a 19th century culture that stirred him into creating a killer from another time ("The Time Killer" was one alternate title), committing a series of six murders of young women over a period of 18 days, only to disappear for 21 years until the next spate of killings. Kolchak finds himself happily employed once more due to a chance meeting with Vincenzo, but the honeymoon doesn't last long as a new story even more incredible begins to take shape due to the diligence of Daily Chronicle librarian Titus Berry (Wally Cox), who helps connect the dots by starting with a previous set of similar crimes from 1952, all detailing a loss of blood from a needle puncture at the base of the skull, rotted flesh left on each woman's crushed throat: "as if they had been strangled by a dead man!" Continuing their research further back, they discover that the same number of victims covering the same span of days dates all the way back to 1889, another lead arriving via author Mark Twain, describing a chance meeting with Dr. Richard Malcolm (Richard Anderson), a former Union army surgeon during the Civil War who believed that immortality was achievable through an 'elixir of life.' Margaret Hamilton puts in a splendid cameo as Prof. Crabwell, whose pontifications on the nature of alchemy conclude that the main ingredient necessary for this potion to succeed is human blood. All of this is too much for a beleaguered Vincenzo and aging publisher Llewellyn Crossbinder (John Carradine), compared by Kolchak to Cotton Mather (Vincenzo: "don't underestimate him, he may be old but his fangs are potent!"), while equally exasperated police captain Roscoe Schubert (Scott Brady) handles the case his own way, until all six victims are claimed by the 18th day. The connection between Dr. Richard Malcolm and a clinic named for Dr. Malcolm Richards leads Kolchak to the fabled Seattle underground and a final date with destiny, revealing a 144 year old culprit ready to disappear for another 21 years once he ingests the final dosage. McGavin may have clashed with producer/director Dan Curtis but it doesn't show in his performance, a spirited, robust presentation of facts (or 'screwball speculation' in Vincenzo's opinion) that even Carradine's publisher can't ignore, until such time that the reporter finds himself unemployed yet again, too damn effective for his own good (both McGavin and Oakland would repeat their roles in all 20 episodes of the subsequent series). As simple and straightforward as the first Kolchak outing was, this sequel is at least its equal with so many intricate threads tied together to weave a web of murder spanning more than a century, with another superb cast bringing it all to vivid life, and special kudos to the set design for the hidden underground, shrouded in fog and a marvel to behold with the rotted corpses in attendance.