The Preachers

The Preachers were an underground organisation in Pete's World dedicated to the downfall of John Lumic's Cybus Industries, and Lumic's creation, the Cybermen.

Distinguishing signs and equipment
The Preachers wore black paramilitary coveralls and travelled in a blue van. Their emblem looked like a circled P. (DW: Rise of the Cybermen) When they travelled to the Tenth Doctor's universe, they also carried large guns. They also possessed large medallions allowing them to cross between their universe and the Doctor's. (DW: Doomsday)

History
The Preachers were publicly known as a small-scale pressure group, dismissed by John Lumic as an irrelevance. (Cybus website)

The London cell of the Preachers included their leader Ricky Smith, Jake Simmonds and Mrs. Moore. Pete Tyler, under the codename Gemini, passed information to them covertly - an accident on his part, as he thought he was passing information to the security services. After Ricky died, his counterpart from the Tenth Doctor's universe, Mickey Smith, took his place. Mrs. Moore had also died in the meantime. (DW: Rise of the Cybermen, The Age of Steel)

Mickey Smith was able to cross back through The Void to his home universe using one of the medallions developed by the Pete's World version of the Torchwood Institute. He infiltrated Torchwood 1 disguised as lab technician, and investigated the Void Ship. Mickey incorrectly believed it contained the ultimate Cyberman leader, such as a CyberKing. The Void Ship actually contained the Cult of Skaro. (DW: Army of Ghosts) Jake Simmonds and Pete Tyler soon followed Mickey from their own universe. (DW: Doomsday)

Behind the scenes

 * The Preachers' emblem, a circled "P", was seen in the Doctor's universe. It was seen as faded graffiti on rusty bins outside Bernie's flat in Cardiff (TW: Ghost Machine) and inside the present day Ritz. (TW: Captain Jack Harkness)