John Oliver did so well filling in as host of The Daily Show last summer that HBO felt compelled to offer him his own show. Last Week Tonight is that show. Here is its first promo, and it’s funny, especially as promos go. It doubles down on Oliver’s proclivity for self-deprecation and the show’s time, Sunday at 11 p.m. Last Week Tonight premieres on April 27. Until then, no one’s allowed to make news. Sorry, Putin.