Original sentence: Recovering from unconsciousness, the Doctor briefly slips back into the personality of one of his previous selves, allowing Colin Baker to do an impersonation of Jon Pertwee.The Inquisitor and the Valeyard reference the events of The War Games
Edited sentence: Recovering from unconsciousness, the Doctor briefly slips back into the personality of one of his previous selves, allowing Colin Baker to do an impersonation of Jon Pertwee ("My head hurts abominably, Sarah Jane.The Inquisitor and the Valeyard reference the Doctor's original trial in The War Games