I finally got to series 4 episode 18. But to my horror it stops a few минуты before it ends!!! Nothing works:-( Can anyone tell me how it ends??? It stops when the kid has come from school and G asks how old he is.

After Grissom asks how old the boy is she tells him he will be 9 in a month. Then they do a DNA test between Mr.Cleary and Martin(the boy). They find out that Walters sister was also known as Libby. The DNA test proves that he IS Mr.Cleary's son, and that Walter killed Marissa and cut the baby out of her stomach then gave the baby to his sister and сказал(-а) the mother ran away and didn't want him so she raised him as her own. The last scene is of Grissom looking at a рубашка from the evidence.