Very few brands are as powerful as Shonda Rhimes’s (“Scandal”). She is so important to ABC as a network to the point where it has essentially given her a night of her own. However, “Thank God It’s Thursday” has been facing rating declines as of late. Both “Scandal” and “How to Get Away with Murder” are down double-digit percentages from where they were last season. While neither show is in range of being cancelled, “TGIT” is in desperate need of a hit that will help stabilize the night. “The Catch” is not that show.