Zeitgeist (Black Sun Rising)

Zeitgeist was a parahuman in the early times of the Time Lord civilisation. He was a member of the Special Executive, a team working for the Time Lords. He was skilled in the art of detection and he showed the ability to pass through solid matter. He wore a black skin-tight costume, with a white hourglass on his chest; his attire left uncovered just his face.

During a trilateral negotiation on Desrault, he was part of the Gallifreyan delegation. He was charged to investigate about the identity of the third party, besides the Gallifreyans and the Sontarans; breaking into the dormitory of the ambassadors, he discovered they were representatives of the Order of the Black Sun, who would have become enemies of the Time Lords in their own future timeline. (COMIC: Black Sun Rising)

Invalid appearances
In the Walking in Eternity short story Executive Action Zeitgeist appears alongside other members of the Special Executive including Wardog, Cobweb and Fascination. It is explained that the Special Executive are Parahumans, early Loom-born experiments ordered by Rassilon, who are embued with time energies which give them strange abilities. The prototypes were rejected and thus became known as 'The Bastards of Rassilon', although they continue to be used by the High Council to do the Time Lord's dirty work. During a civil war on Gallifrey between the Loom-born and womb-born Gallifreyans, the Special Executive departed Gallifrey leaving the two sides to battle it out.

Zeitgeist also made a small cameo appearance in 2017's Guardians of the Galaxy: Mother Entropy alongside Gatecrasher and Yap. In this appearance he was depicted as having blue skin.