An hour-and-a-half. That’s the length of every episode of “Saturday Night Live.”

For perspective, that’s only half an hour less than the recently released “Justice League” — and only an hour less than “Star Wars: The Last Jedi,” the latest installment in George Lucas’ sci-fi saga.

It’s a hard runtime to justify, considering that even lovers of the satire program typically share only three or four segments on social media.

With each segment lasting just three or four minutes, that leaves a lot of forgettable airtime — for both detractors and fans.

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Given that the series leans aggressively one way politically and is padded with mostly forgettable material that makes a viewer pine for past seasons — it’s hard to understand why this show needs to be so long. Maybe if it took potshots at both sides of the political aisle or spread its humor out to cover more than just what’s trended on Twitter in the past week, “Saturday Night Live” could justify its current runtime; but as it stands, it quickly overstays its welcome.

The latest episode of “SNL” was as predictable and devoid of laughs as every other installment since President Donald Trump was elected.

The show’s cold open brought back Alec Baldwin’s version of Trump, which — as most people recall — the actor famously promised to retire long ago. Cecily Strong played Melania Trump, Scarlett Johansson appeared as Ivanka Trump, and Leslie Jones starred as the recently resigned Omarosa Manigault Newman.

“You can finally say [Merry Christmas] again because the War on Christmas is over,” said Baldwin’s Trump in the holiday-themed segment.

“It will soon be replaced by the war with North Korea,” he added.

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Baldwin’s Trump also said this: “It’s Christmas time. Soon white Santa will be coming from house to house, taking presents from Muslims and illegals and giving them to American children.” (Groan.)

The rest of the sketch was as flatlined as much of its other recent political takes.

In case you’ve missed how biased “Saturday Night Live” has become, cast member Pete Davidson revealed a tattoo this week — which seemed an attempt to add fire to any arguments that “SNL” could be left-leaning.

“Wanted to get @hillaryclinton a Christmas gift, so I got a tattoo of my hero. Thanks for being such a bad*** and one of the strongest people in the universe,” posted Davidson on Twitter along with his tattoo.

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Related: ‘Saturday Night Live’ Goes Light on Politics

“Saturday Night Live,” at this point, leans heavily on the White House goings-on for its material — and then doesn’t do it well at all. It’s got a long way to go before it’s a comedy that provides real laughs again.

Even Kevin Hart, during his third hosting gig, flopped badly. “Much of the night was slack and sour, loudly straining for connection as much as Hart did in his truly weak and misguided monologue,” noted the entertainment website AVClub.com.

(photo credit, homepage and article images: NBC’s “SNL”)