Holo-Doctor

An interactive AI hologram or holo-me was used by the Thirteenth Doctor to assist her in thwarting the Master's Dalek Plan. Though primarily appearing in her form, the hologram could also assume the appearance of other incarnations of the Doctor. (TV: The Power of the Doctor)

A hologram of the Fifth Doctor made amends with Tegan Jovanka, reminding her that he never forgot her after they parted company. (TV: Resurrection of the Daleks) A hologram of the Seventh Doctor made amends with Ace after their fall out. (PROSE: At Childhood's End)

A hologram of the Fugitive Doctor assisted Yasmin Khan and Vinder in reversing 's theft of the Thirteenth Doctor's body. (TV: The Power of the Doctor)