29 Sep 1967
"A war is started between humans and an alien race called The Mysterons."
06 Oct 1967
"The Mysterons seek revenge for the destruction of their Martian base. Their target? No less than the Director General of the Asian Republics. Can Spectrum foil the Mysterons, or will Earth suffer the loss of a great leader"
13 Oct 1967
"The Mysterons threaten to blow up London with a bomb they have stolen. Spectrum race against time to stop this latest and greatest threat to mankind"
20 Oct 1967
"The Mysterons make their first mistake when Captain Black, revealed to have become a Mysteron agent, breaks into the Culver Atomic Centre and is exposed to radioactivity that will enable ..."
27 Oct 1967
"When the Mysterons threaten to destroy key links in the Frost Line Outer Space Defence System, Scarlet and Green investigate the mysterious deaths of the personnel at Red Deer Base."
17 Nov 1967
"The Mysterons' cryptic threat to \"kill time\" has the Spectrum personnel stumped until Magenta realises that their target is General Tiempo, the Commander of Western Region World Defence."
24 Nov 1967
"Two new anti Mysteron weapons (Mysteron detector and gun) are developed from knowledge of the Mysterons. These are shown at a conference below an African hunting lodge. The Mysterons, ..."
01 Dec 1967
"The Mysterons threaten to obliterate North America, but Spectrum is left without its number one agent when Scarlet is dismissed for gambling offences."
15 Dec 1967
"When the Lunar Controller announces the Moon's independence from Earth in the war of nerves with the Mysterons, Scarlet, Blue and Green journey to Lunarville 7 to investigate reports of an ..."
22 Dec 1967
"When the Mysterons threaten the life of the Supreme Commander of Earth Forces, Scarlet and Blue are assigned to escort him to SHEF HQ in New York"
29 Dec 1967
"The Mysterons target fashion designer Andre Verdain, secret controller of the European Area Intelligence Service."
05 Jan 1968
"When the Mysterons threaten to kill one of the Angels, Scarlet and Blue are sent to Paris to escort Destiny back to Cloudbase."
26 Jan 1968
"Scarlet, Blue and Green volunteer for a dangerous mission to remove the power source of the Mysteron complex in Crater 101 before it is destroyed by a low yield atomic device."
02 Feb 1968
"Astronomers at K14 Observatory are monitoring signals from a hidden satellite that has made a successful landing on the Martian moon Phobos."
09 Feb 1968
"Using the Mysteron pulsator recovered from the complex in Crater 101, Dr Kurnitz has developed a transmission device with which Colonel White attempts to contact the Mysterons and sue for peace."
16 Feb 1968
"When the Mysterons threaten to immobilise the whole of Spectrum, Scarlet and Blue are sent to the Spectrum oil refinery at Bensheba."
23 Feb 1968
"Captain Black engineers the death of chief test pilot Major Gravener, who is retrometabolised as a Mysteron agent as part of the Mysterons' plan to destroy the World Capital, Futura City."
01 Mar 1968
"When the Mysterons threaten to sabotage a vital conference at Lake Toma in Switzerland, Scarlet and Blue are assigned to escort the world's leading astrophysicist, Dr. Conrad, to Geneva."
08 Mar 1968
"Mysteron agent Judith Chapman steals a phial of deadly K14 virus - enough to kill ten million people - from Biological Research Station D near Manchester."
12 Mar 1968
"Tritonium alloy mining operations at Hotspot Tower in the North Pole are threatened when a Mysteron agent cuts the power to vital heating elements."
26 Mar 1968
"A lorry carrying an atomic core reactor to the new Manicougan power complex falls into the hands of the Mysterons who intend to strike the Atlantic Seaboard of North America."
02 Apr 1968
"When the Mysterons threaten to destroy President Roberts within twelve hours, Scarlet is assigned as bodyguard to the sceptical President."
09 Apr 1968
"The Mysterons threaten to destroy the Triumvirate of Europe, the three most powerful men on Earth after the World President."
23 Apr 1968
"The ultimate mind game is unleashed, Spectrum, turned against itself. Captains Scarlet and Blue travel to outback Australia in a desperate attempt to unravel the Mysteron plans before it is too late."
30 Apr 1968
"When the Mysterons threaten to destroy the World Navy Complex at Atlantica, Blue and Ochre fly a V17 Air Force bomber to destroy a wreck that has been sighted drifting towards the base."
07 May 1968
"After the Mysterons threaten Spectrum's Cloudbase headquarters, a large fast-moving trace appears on the radar."
14 May 1968
"Captain Blue disappears from a restaurant. He awakes to find it is 3 months later and Spectrum Security want to know where he has been, and if he is even the real Captain Blue."