Let’s use this thread to share what we know about premiere dates for Summer shows. If the show you have info for is new, please provide a brief description (if you have one)
This is what I know so far:
Returning Shows -
Monday June 7th:
Last Comic Standing 8 p.m. (NBC)
Sunday June 13th:
True Blood 8:45 p.m. (HBOe)
Design Star 10 p.m. (HGTV)
Tuesday, July 13th:
Warehouse 13 p.m. (Syfy)
Friday, July 9
Eureka 9/8c (Syfy)
Tuesday, July 13
White Collar 9/8c (USA)
Wednesday, July 14
Psych 10/9c (USA)
This looks comprehensive.
Umm, didn’t they already do that back in 2000? 
Don’t forget Leverage, Sunday June 20, TNT
My summer show has already started for the season. So You Think You Can Dance started their audition shows. Next week starts the actual competition shows, I believe. Wednesdays and Thursdays on Fox at 8/7C.
The Closer starts July 12.
I can’t find the older thread with someone asking about Warehouse 13 season two, but just so we’re all on the same page, they moved up the premiere date by a week to tomorrow, July 6th.
Entourage is already back (two weeks now? Three?)
Weeds August 16.
Party Down is already over, forever 
In the UK:
The IT Crowd started back on June 25.
That Mitchell & Webb Look July 13
What do you mean? I thought it was just the season finale?
It was cancelled last week. cite
DAMNIT! I watched Gravity as well and really liked it. Boo on you Starz… boo on you!