Did you like those "Choose Your Own Adventure" books as a kid? Then you should turn in to the Jan. 14 episode of "Hawaii Five-o." For that week, viewers of the CBS drama will get to choose from one of three endings during a real-time vote. Votes will be tallied throughout the episode via Twitter and CBS.com and the winning ending will be the one that is shown. After the show airs, the other endings will be available to watch online.