The first episode!!
Chat with our AI personalities
the very last episode in the final act
99
I believe it is in the 2nd episode, when he goes through the well to get Kagome back because she can see Yura's hair.
InuYasha never actually picks. It's a complicated situation. In the end Kikyo dies for good, and does not come back to life. So, he's left with Kagome. In the end, InuYasha and Kagome get married, but who knows what would've happened if Kikyo lived? I think he would've chosen Kagome because their bond was greater than his bond with Kikyo. In the end, he never picks. He is merely left with no choice but to stay with Kagome. Although, he will never forget Kikyo.
Actually, it happened in the 2nd movie, not an episode. Inuyasha tracks Kagome down and tries to take her back with him, but she school stuff to do, so they get into a fight on a sidewalk, inside a photo booth, while a crowd gathers to hear them. Sota puts in money to take pictures, so they can see how they are making a scene. Inuyasha even tried " Iron Reaper, soul stealer" on the booth, as it is taking pictures, and Kagome "SIT's him. It's very funny.