Definition of checksum. : a sum derived from the bits of a segment of computer data that is calculated before and after transmission or storage to assure that the data is free from errors or tampering.
The production of season 4 is scheduled to start June 20, 2016, thus we wonât see anything from the new season this year. The Ray Donovan project was awarded by a great name from the Showtime president, who called their top show as the channelâs signature series.
But Katie Holmes has revealed that her stint of Ray Donovan is already over. Despite many fans, and even critics, believing the 37-year-old would be back for a fourth season, the star told Live With Kelly & Michael on Monday that this was not to be the case. Scroll down for video. That's a wrap: Katie Holmes revealed on Monday that her stint of Ray Donovan is already over.