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.

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

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)

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The Seventh Doctor had previously given Bernice Summerfield a "simple, interactive hologram" of himself that projected from a small pyramid, originally intending to give it to Ace before she left them. Benny considered its realism perfect apart from haziness around the edges, and mentally referred to him as the "holo-Doctor" or "h-Doctor." He wore the Doctor's brown coat, hat, and usual umbrella. ([[PROSE: Infinite Requiem)