He was first seen in a secret lab were he ordered his team of technicians to open the ship. It started to heat up and he ordered the teams to begin extraction. Later after Kara Kent told Clark about the blue crystal she was supposed to protect we saw him holding the crystal and talking with a man on the phone.
Lex visited Carter as he and his workers were working to find the blue crystal. Lex told Carter that whatever he was working on, he would find out. Lex walked out and the workers continued their work as Carter looked on.
Later Carter captured Kara Kent, put meteor rock handcuffs on her, and interrogated her about which planet she came from. After a while, Clark came in to rescue her, but was weakened by the Kryptonite. In the end, Lionel Luthor burst in and shot Carter.