In his final show for 2017, John Oliver revisits some of the most embarrassing and obnoxious moments of the Trump presidency over the past year. He zeroes in on the many ways that Trump has trashed presidential norms, from hiding his tax returns to keeping assets that create enormous conflicts of interest.

Even Trump’s speech patterns — his tangled grammar and incomprehensible diction — represent a bizarre departure from normal standards. To demonstrate, Oliver presents a simple but amazing printout of Trump’s recent remarks on the Iran nuclear deal. Which make less sense than a text message composed randomly by an iPhone from programmed words and phrases.

This tour de force includes Oliver’s meta-analysis of Trump strategies — from delegitimizing the media through “whataboutism” and trolling — to what the comedian considers “the most frightening statement a president has ever made.”

And a bonus extra: Because Last Week Tonight is going on hiatus, this show includes an appearance by the Catheter Cowboy, with several messages for the president. (Sample: “Just because Jared Kushner is smarter than you, it doesn’t mean that he’s smart.”

Not to be missed.