Even if we have the best intentions for keeping in contact with old friends, former colleagues and random acquaintances, as our social networks grow, it can be hard to follow through. Here are five apps that try to make it a little easier.
According to Deadline, three different endings were filmed for this Monday's Hawaii Five-0, each featuring the reveal of a different killer.
During the live broadcasts (both East Coast and West Coast), viewers will be encouraged to vote for whodunit via Twitter or the official CBS site - the winning ending for each broadcast will be aired in real-time. This could, at least in theory, lead to CBS airing a different ending in New York than in Los Angeles.