Will paced the length of his room, trying to rationalise the anger that he had spewed out in Magnus' office. He wanted to convince himself it was warranted, that she had no right to try and sabotage his relationship while she was engaging in her own dalliances that were far more detrimental... but he couldn't deny one major flaw to the logic.

It wasn't just Tesla, any other man would leave him with the same level of unease.

The fact he despised Nikola -now more than ever- was just an extra jolt and he didn't know why the thought of her seeing someone else unsettled him so much. The uncertainty fuelled his frustration but he didn't dare dwell on the reasons, scared it would open up another floodgate.

He already had enough to deal with.

Lowering himself to the bed he let out a long, strained sigh. If he was certain of Isabel's innocence, why was he desperate to prove it? He could lie and say it was to rub in the fact that Magnus had no right to discredit his relationship but there was more to it than that, a minute wavering of doubt he couldn't quite shake.

Either way, there was an easy solution. He still had contacts in the FBI, a background check wouldn't take more than a few minutes but then what? Could he carry on knowing he hadn't trusted his girlfriend, that he had gone to such extreme lengths without simply talking to her first?

He pulled out his phone, staring at the keypad.

There was no subtle way to engage the conversation, she would know instantly he had doubts and he wasn't willing to rock the boat without justified reason. Instead of dialling the familiar number he skimmed through his contacts, pressing call and waiting patiently until the line picked up. "Brian hey, it's Will..."

The request rolled off his tongue with surprising ease and after exchanging information and the mandatory pleasantries, he flipped the phone shut in a state of stunned disbelief. There was no 'Isabel Clarkson', or at least not one who was in her late twenties and worked as a biologist. There was however a Harper who fit Isabel's description almost perfectly... except for the fact Harper had been orphaned at the age of seven when her parents had died suddenly.

He felt the air constrict in his chest. Magnus was right, she was lying... but why?

Rising from the bed he strode to the door with a burst of urgency, flinging it open to reveal a startled Kate.

She pivoted towards him, folding her arms with a curious nod, "hey, what are you doing up here?"

He pulled the handle behind him, sealing the room with a soft click as he noted her expression, "what do you mean, this is my room?" He scratched the back of his head, looking around as if to confirm the fact but she didn't seem any more convinced he should be there.

Kate rolled her eyes at the obvious explanation, trying her best not to poke fun at him. "Well yeah, but I just saw your girlfriend go into Magnus' office." He seemed to visibly pale at the information and she tensed in response, wondering why the news had unsettled him. She would've hung around for herself except she was already late to feed their recently captured Rephectohr, not an abnormal that she wanted to see hungry given it could inhale her as an appetiser.

'Do me a favour-" Will brushed her shoulder, trying to swallow the unease that was knotting in his stomach, "it's probably nothing but I want you and Henry to meet me down there in five."

"Okay, sure..." she nodded, sensing he wouldn't appreciate being seconded to a hungry carnivore.

The animal would just have to wait for it's meal.

Will started in the opposite direction, swivelling around with a sudden afterthought, "and make sure you bring a stunner." He was relieved when she still didn't press him for answers and he turned, quickening his pace.

It was no doubt just paranoia. He trusted Isabel and was sure there was a reasonable explanation but in his experience, even without relying on instinct, it was always better to be safe than sorry.