Doctor 8

Doctor 8 is a think tank located at Big MT

Background
Doctor 8 is a pre-War doctor who became a think tank to continue his work at the Big MT. He has lost the ability to talk due to damage sustained to his voice module during an encounter with another visitor, Elijah. Instead, he transmits RobCo sound waves, which appears in subtitles as patterned RobCo terminal symbols. However, after passing a 75 Science check or a 7 Perception check, the Courier understands him, although this does not alter the subtitled text.

Effects of player's actions
If the player character has shown 8 the fully upgraded Sonic Emitter, and if they don't have a 100 in Science or 85 in Medicine to convince Doctor Klein, 8 will side with the player character in convincing Klein to back down.

Other interactions

 * Talking to 8 with a fully upgraded Sonic Emitter will result in him providing 100 energy cells.
 * He will give the Courier microfusion cells (if female) or two containers of Cram and two duct tapes (if male).
 * Sympathizing with him will yield ten microfusion cells and a copy of Tales of Chivalrie (if female), or La Fantoma! (if male). Once a day, it is possible to ask him if he knows any good ways to pass the time, which will yield the same gift. Asking him for something to literally pass the time yields an egg timer instead.
 * Consoling him opens up the option to ask him if he has made any new discoveries, which will yield a copy of Programmer's Digest, Fixin' Things and a sensor module.

Appearances
Doctor 8 appears only in the Fallout: New Vegas add-on, Old World Blues.

Behind the scenes
Chris Avellone stated that according to Brian Menze, Doctor 8 is depicted on the Old World Blues intro slide of the Think Tank members, second from the right.