. >> and ncii and ncia l.a.rs reveal the christmas. >> maybe we stole a christmas tree. >> closed captioning provided by -- . ♪ >>> the lights went out. >>. ♪ >>>. ♪ our whole universe was in a hot dense state ♪ >> i can't believe it's over. >> crazy. >> but fans said good goodbye to the number one comedy, the big bang theory after 12 seasons. >> it was so cool we got to do our show from there in the en. by the way, we were there for lots of episodes, including a special christmas episode. >> love decorating the christmas tree. makes me feel like a little girl again. >> we are doing a -- yes a little christmas episode. christine bran ski sheer. we get to get drunk together. >> icons! >> christine bran ski i'm trashed right now in preparation. >> another round for meehan and my home girl. >> if you don't have fun, don't bother. >> over 15 million watched this big bang christmas episode when it aired in 2009. it was the skekd time christine gechted as leonard's mom, went on the for a fogeltanz 16 appearances on th