We were thinking that Sam could've called Jack himself while he was heading out alone -- they wouldn't have had to get any lines from the actor, just have Sam on the phone saying something like, "Yes, you can finish the bagel bites, but eat an apple too, and by the way be careful not to touch any of the dangerous and powerful artifacts that may be scattered about our place and in retrospect maybe leaving you alone there wasn't my best idea?"

(...okay I can see why the ep didn't...)