Last week’s entertainingly unpredictable episode of Gotham ended with Jerome, the apparent Joker-to-be villain played by Cameron Monaghan, killed in a fall – and killed in a definite enough way that, even with all the back-from-the-dead stories already spun out on this series, it seemed Jerome, and thus Monaghan, was not to morph into the iconic Joker after all. But then, in the final scene, a package sent by Jerome before his death to his reclusive and meek brother Jeremiah was delivered. Jeremiah opened it and was sprayed in the face by a variation of Jerome’s bizarre toxin, which bleached Jeremiah’s skin, froze his lips into a permanent leering grin, and drove him to a sort of cackling insanity. Presto! Instant Joker! And since Jeremiah, too, is played by Monaghan, the same actor eventually gets dealt the same card to play – starting tonight.