There's something in what he says that pings as familiar. Tardis might be something he's heard before, and his cursed self has some understanding of what a police box is (or was).

No definite connections.

But when he starts into talking about science, Gold has to tell himself that he is not having a cup of tea with Frankenstein, who very much wanted to make the division a pissing contest. A challenge that the Dark One rose to on several occasions but the idea of doing that in his own house really makes him want to roll his eyes.

And maybe it's because a sticking point comes up with it.

"The less said on time travel, the better."