I caught last night's which I assume is a rerun because Penny and Leonard are still together. It's the one where Sheldon decided to experiment with Penny by giving her chocolates for good behaviour i.e. animal behaviour modification or whatever it's called. Leonard catches on and tells him to stop and get's a bit angry so Sheldon sprays him in the face with a water bottle for bad behaviour!!! OMG I died!

Meanwhile, Howard and Raj are out at a "Goth" bar with those tattoo sleeves on trying to fit in.