Billy was very busy yesterday with several interviews in respect of the CSI Series Finale and the upcoming new series of Manhattan. As soon as the interviews are published we will be sharing them, but for now enjoy these tweets and photos from all the interviewers.
— Jenny Cooney (@JennyCooney) September 22, 2015
Meeting William Petersen alias Grissom, who guest-stars in the very finale of CSI, that will air September 27 on… http://t.co/X3z9m2dFrM
— Jean-Ph Darquenne (@jphdarquenne) September 22, 2015
— ruben nepales (@nepalesruben) September 23, 2015
— margaret gardiner (@MargaretGGG) September 23, 2015