With her semiautobiographical web series The Communist’s Daughter newly streaming on CBC Gem, writer-director Leah Cameron is here to celebrate Don McKellar’s Last Night, the delicate 1998 drama about a handful of Torontonians — played by Sandra Oh, Sarah Polley, David Cronenberg, Tracy Wright and many more — facing the end of the world. Your genial host Norm Wilner is just happy we made it to the other side.