The Alliance (Fugitive of the Judoon)
From Tardis Wiki, the free Doctor Who reference
The Alliance was an organisation that sought to prevent the return of the Cyberman Empire. In the 21st century, Captain Jack Harkness told Graham O'Brien, Yasmin Khan and Ryan Sinclair that the Alliance sent something back through time and space. (TV: Fugitive of the Judoon)
The Thirteenth Doctor and her friends later visited Mary Godwin, Percy Shelley, Lord Byron and Claire Clairmont in Villa Diodati in 1816 where they discovered that the something was the Cyberium and that a Lone Cyberman was searching for it in order to change the future. The Cyberman also recalled that his children had joined this "resistance" and so he had to slit their throats. (TV: The Haunting of Villa Diodati)
