Complex sentence: It was slated to premiere after the series finale of' on March 26,2010, but actually premiered on April 23,2010, in the US and in the UK and Latin America on October 10,2010 at 10 a.m. (10/10/10).
Split into simpler sentences: It was slated to premiere after the series finale of', which was on March 26,2010. The show itself aired on April 23,2010 in the US and in the UK and Latin America on October 10,2010 at 10am (10/10/10).