How can I get the Mad Scientist to cooperate with me

Hint 1 of 6:

He hates everyone, but at least he talks to his assistants

Hint 2 of 6:

Maybe if you disguised yourself as a lab assistant

Hint 3 of 6:

There's a picture of his assistant inside the dead writer's script

Hint 4 of 6:

The dead writer is on the bed in the lavender bedroom upstairs