The Doctor re entered the Tardis console room it's gleaming white walls contrasting with his bold bright blue coat and making it pop out all the more. Evelyn supposed it was better than the clash of multi colour on monochrome but still wondered if he only kept the room so white for the sake of emphasis by contrast. He certainly had the ego for it always strutting about grandiose and exaggerated always desperate to prove that he was the smartest and most important man in the room, to his credit he was usually the former at least. But right now however he was acting far from his usual self, his typical bravado was replaced with an uncharacteristic degree of worry. He nervously skirted round the console checking readouts and hurriedly working controls frantically trying to complete a task with only limited time.
"Doctor I still don't understand what's wrong"
Said Evelyn the Doctor's agitation making her worried as well.
"Not now Evelyn! We can't afford to lose the trail"
The Doctor continued his work until an affirmative chime rang out from the console.
"Doctor what is going on with you?"
She knew the Doctor could be abrasive but it was rare for him to be so plain rude.
"I'm sorry Evelyn but I needed to pinpoint the source of the disturbance."
Evelyn looked puzzled
"What disturbance?"
"Someone or something has altered the established timeline. You don't remember because it has affected you as well but before it's alteration history records that the dodos died out hundreds of years ago."
She wasn't sure whether she believed the Doctor or not, dodos were certainly rare but extinct? But after everything they had been through together he had more than earnt her trust.
"So we need to change it back like that time with Queen Mary. but how?"
The Doctor adjusted a few more controls and a set of readouts appeared on the scanner screen
"This details the source of the temporal fluctuations we detected earlier. I think it might also be the source of the time shift."
"Where is it?"
"The island of Mauritius somewhere in the seventeenth century. Same as where they dodo went extinct in the original timeline."
"We should get going then."
"Are you sure? Whoever did this clearly has access to time travel, which means they could be extremely dangerous."
Evelyn nodded with silent conformation and the Doctor replied with a pleased smile and began flipping switches and pressing buttons sending the Tardis hurtling back into history.