Post a number, Finch is to meet Reese at a bar before they head back to the library.

Wesley decides it's time for that drink, which turns out to be drugged.

Fortunately, Finch gets them in time to extricate Reese before Wesley can do anything (I'm itching to see Finch facing Wesley down, in the bar, all protective and furious).

Then Finch gets him back to the library for some comfort and looking after.