ABC

It's getting to be that time of year when networks roll out their Upfront presentations, shoring up existing series for next year, though ABC, for one, has yet to make many official announcements over its renewed series. Even will all the cancellations and renewals, however, many have begun to announce premiere dates for unpopular series to burn off their remaining episodes, so when can you check

In spite of the horrific events which took place in Boston this week over the marathon bombings, the only major shift triggered in broadcast primetime was that of NBC's newest 'Revolution' episode, pushed back a week for its bomb-themed content and to air additional news coverage. Now, ABC's 'Castle' has opted to re-schedule an upcoming episode with a bomb inherent to its plot, but what will air i