Lyrics: Strange voices are saying ah what did they say? Things. I can't understand?

Questions

Which television western series always ended with the words 'Head 'em up, move 'em out'?

Who wrote the book Coral Island?

Who plays Captain Jean Luc Picard in the series Star Trek, The Next Generation?

Which character was portrayed by Meryl Streep in the film Out of Africa?

In which television series do the characters Doctor Green and Doctor Lewis appear?