So, what happened to last week's Chuck, eh? Right after the final ad-break, it comes back in right at the end of a scene, to which Chuck later refers while talking to Ellie. I recorded the repeat, which I've just watched, to see whether the same problem exists: it does.
(Mind you, I was only watching that because I'd sat down to watch this week's, only to discover that it's still recording. Forgotten (yet again) that I record it on Virgin+1. See above under Bah.)