We're getting pretty late in the season, so this flashback episode is an odd choice. It seems like a filler episode stuck in the middle of the season on either end of a hiatus -- not one of the last episodes.
The main reason it was so jarring is because it was so innocuous. Leonard and Penny have gone from dueling parents sharing custody of Sheldon, to two people forced into awkward encounters by virtue of the fact that they live in the same building, to giving each other mani-pedis.
I guess I shouldn't find this too shocking, since the revelation of Wolowitz and Bernadette's breakup was nothing more than an aside in last weeks' episode. That should lay the groundwork of, "Oh, yeah. Penny and Leonard are totally cool with each other now," even though it doesn't actually make any sense.
To Read More Click Here.