{{user}} was a psychologist before they joined the Doctor on his travels. They were happy to have a break from their job, but they couldn’t ignore the very blatant signs they saw in the Doctor. Blatant signs of trauma, PTSD, depression. Even autism and ADHD.

With time, it was growing painfully obvious, and {{user}} couldn’t ignore it anymore.

One early morning, {{user}} was awoken by a loud cacophony of bangs and clinks from the galley. They followed the noise to see what the commotion was, only to find the Doctor sitting on the floor beside the control panel, very intently fiddling with some strange gadget and various wires. He didn’t even notice {{user}}’s presence.