-The next season of "Hell's Kitchen" will begin on June 1st and will air on Tuesday nights instead of the previously scheduled Thursday nights. The first two episodes that season will last an hour long; after that, all episodes until July 27th will run two hours long. The season finale will be August 10th. All episodes will begin at 8 PM EST.
-"Masterchef" will debut on July 27th at 9 PM EST, and will regularly air Tuesday nights in that timeslot. This show was also supposed to have aired on Thursdays.
-The first three episodes of the upcoming season of "So You Think You Can Dance" will air May 27th, June 2nd and June 3rd respectively, all starting at 8 PM EST and running two hours long. Afterwards, all Thursday "Dance" episodes will shift to 9 PM EST.
Source: The Futon Critic