"It was a very big deal," Tassler told reporters at the Television Critics Association press tour. "That show has been extraordinarily successful for us.
"What we looked at was [the flow on] Friday versus Sunday night. It was a very tough choice, but... it had to do with the schedule."
Tassler also defended the decision to renew the Gary Sinise-starring CSI: NY, TV Guide reports, promising that the show's ninth season will contain more humour and "big, New York-centric event stories".