Confession

In 1927, Jack Harkness claimed that it had been seven hundred years since his last confession. (TV: Immortal Sins)

The Church of the Papal Mainframe employed Silents as confessional priests. The Silents were genetically engineered so that the confessor would forget everything they told them after turning away. (TV: The Time of the Doctor)

The Twelfth Doctor had a confession dial, in which contained an entity whom would make him confess his personal fears and lies. (TV: Heaven Sent)

The Pope offered to hear the Twelfth Doctor's confession but the latter refused, claiming he would take too long to confess everything. (TV: Extremis)