unknown object. Having landed safely, but a hundred miles off, the two parties set off to meet each other. On the way, Jimmy (and Hamlet) fall down a hole which turns out to be an airshaft that leads to a large cavern. Inside, the MRI group discover an airlock, which leads them all to discover an alien craft. After the party of MR2 arrive, they discover the fossilised body of a man and find an ancient journal regarding the man was once part an alternative human, among others, who fled earth from a war only to die from lack of supplies on the Moon. Elsewhere, meteors strike MR1 and the rocket explodes, meaning that only two members of the expedition of can leave in MR2. Then Wedgwood makes an attempt to fly the alien vessel. Eventually, the entire group return safely to earth. Once back home, Wedgwood remarks "As man reaches out to touch the stars, who knows what he may find." Pathfinders to Mars Number of episodes: 6 The Imposter Sabotage in Space The Hostage Lichens! (broadcast live) Zero Hour on the Red Planet (broadcast live) Falling into the Sun (broadcast live) Synopsis A secondary mission in a new rocket, MR4 (Moon Rocket 4), to the Moon takes off from Buchan Island. This time Henderson takes the lead role as pilot accompanied by Professor Wedgwood's oldest son Geoff as radio operator, Professor Mary Meadows, Henderson's niece Margret (Hester Cameron) along with Hamlet. However one of the crew turns out to be science writer named Harcourt Brown (George Coulouris) who has plans to divert the ship to Mars determined there is life on the planet. Brown succeeds in getting MR4 to Mars, but with the length of the journey, the crew decide that the only way to get home is to find water on Mars. Thankfully, MR4 has landed within a hundred miles of the polar ice cap so the group set off, Brown too, believing there to be life on Mars. Encountering Lichens, crevasses and other perils, Brown is devastated when he discovers no intelligent life and feels cheated by the others. In doing so, he intends to leave the others behind on the planet. However, lichens manage to infiltrate MR4, stopping Brown and giving the Rocket crew a chance to overpower him. However, Earth has moved out of the Martian orbit, thus, making the journey home impossible. Yet