The Golgotha Project

 was a Terrorst organisation formed during the 1960s, during the Cold War. It specialised in finding items considerd "magical" into one collection. These included Excalibur and the secret object code named "The Arimathea Artefact." This artefact was very dangerous, and opend a rift into another world. After the portal was closed with Nuclear weapons, it was found the rift had formed a crater in the ground. The men sought after the Fourth Doctor, who travelled to the world, where they discovered the Second Doctor, who's companion Jamie accidently began to destroy the world when he killed a Gallifreyan Woprat. All the people inside the world were saved and the groups was shut down.