'Flashpoint,' 'Three Rivers,' 'Big Brother' dates

CBS announced some summer premiere dates including the long-awaited return of "Flashpoint" and some burn-off slots for "Three Rivers" (prep those "Hawaii Five-O" trailers!). Here's the lineup:

"Flashpoint" will return on Fridays starting June 4, with its premiere airing at 9 p.m. before shifting to a 10 p.m. slot.

"Big Brother" returns on Thursday, July 8, and will air three times per week -- Sundays, Wednesdays and Thursdays at 8 p.m.  

The remaining episodes of "Three Rivers" will air on Saturdays beginning June 5 at 8 p.m. The slot will be taken over by international co-production police drama "The Bridge" beginning July 10.