Complex sentence: It was released in 1974 and marked the end of an era for the series featuring the last appearances of Sid James, Barbara Windsor (although she did return to co-present That's Carry On!) and Hattie Jacques.
Split into simpler sentences: It was released in 1974 and marked the end of an era for the series. It featured the last appearances of Sid James, Barbara Windsor (although she did return to co-present That's Carry On!) and Hattie Jacques.