Kobra #5 (1976)

Kobra lands his ark in San Francisco. His surveillance overhears Jason Burr and Randu Singh back in New York discussing Melissa's disappearance. Jonny Double, a private eye who questions his current assignment – is helping a secretary accused of murdering her lover/boss. His suspicions are aroused when police records confirm the murder, but there is no evidence of the existence of the boss … that and Double spots his client leaving a motel with her supposed victim. Before he can trail them in his borrowed cab, he is flagged down by a fare. The customer leaves his valise; Double deduces it contains explosives – this WAS a set-up! Double escapes the destruction of his taxi. He finds remains of the case containing the bomb – marked with a strange cobra symbol. Double returns to the office building at which he dropped off his murderous fare and is attacked by three hoods. Dispatching them, Double takes an elevator to a computer control room, where he gathers as much information as he can about the murder of Ricardo Perez and something called Operation: Chrysopylae. Through his contacts, Double learns of Perez, Horst Buchner and … Jason Burr. He calls Jason. Double complains about the heavy traffic on the Golden Gate Bridge due to construction while on his way to testify to a trial. One of the construction workers has a cobra symbol on his hand-held radio. Double hopes to meet Mack, his CIA contact, at a Chinatown theater, but finds Mack murdered. The killer fires on Double. Meanwhile, Jason Burr cannot find a flight to Frisco. The booking agent helps find a flight on a smaller airline. She reaches for her walkie-talkie … which has a cobra symbol on it. The gunman who killed Mack runs for it and Jonny Double gives chase. He also takes out two more Kobra hitmen before escaping onto a cable car. Kobra confronts Double directly and disengages the cable car, causing it to plummet downhill. After several hours of delay, Jason finally boards his flight to San Francisco. The pilot's hand-held radio is marked with a cobra-symbol. Jonny Double jumps from the cable car just before it crashes, knocking him unconscious on the street; his limp form rises slowly in Kobra's anti-gravity beam. The engines of Jason Burr's plane catch fire; it plummets into the Oregon wilderness. Double awakens to find himself strapped to the Golden Gate Bridge. Kobra reveals his plan: "an earthquake created by one of my devices … which is implanted in the beam to which you are tied. The mechanism is constructed of a material that disintegrates when it vibrates. The earthquake's shock-waves will destroy the machine and no evidence of its ever having existed will survive! The device extends down through the support beams – into the bay – forming a needle which penetrates the earth's crust! The needle will cause the San Andreas fault to shift! The action of sunlight on the solar panel triggers the mechanism. At dawn – approximately 20 minutes from now – the bridge will be the first casualty." And Double will be the second!