Complex sentence: He starred opposite Judi Dench for over a decade in the situation comedy "As Time Goes By"; it has been rerun extensively in the US on PBS and BBC America and perhaps is the role for which American audiences remember him most.
Split into simpler sentences: He starred opposite Dame Judi Dench for over a decade in the situation comedy "As Time Goes By". It has been rerun extensively in the U.S. on PBS and BBC America and perhaps is the role for which American audiences remember him most.