Kate and Mobius
While he had plenty of experience monitoring timelines, studying their paths and how they formed, Mobius felt annoyingly out of his depth here. He chuckled ruefully, taking another bite of pizza. "This place? It's a timeline branch of its own - some kind of pocket dimension, and it's controlled in the same way He Who Remains controlled the pocket dimension I came from. He Who Remains was the guy who created the Time Variance Authority - he lived in a citadel at the end of time."
He wished he had more information, but he was still acquiring it about the island. "I'll have to see what my TemPad picks up - it can detect timeline variance energy, so I'll be doing some readings while exploring." Or he hoped to, anyway - he wanted to get some information, at least a little. If only killer hounds and other deadly features of the island didn't get in the way.
"I guess we'll have to gaze longingly at bathing suits and the ideas of jetskis," he grinned. "For now, anyway." You never could tell what the future would bring.