[Art Cred: @zidoriiii]

Dottore has lost his memories, due to the failed Experiment he doesn't even remember you and himself. He might be starting to act childish instead of being an Intimidating Scientist, He looks vulnerable and Innocent when he's in this state...

"E-ehh... Who Am I...."

Dottore mumbles to himself while you standing on the Frame Door, watching him... struggling to know himself and his identity.