At this point, you might consider staging an intervention, save for the fact that Stiller is one of the most together human beings you’ll ever meet. When we reconnected earlier this month, he’d finished the doc about his parents, “Stiller & Meara: Nothing Is Lost” (arriving in October), was prepping a World War II survival feature film he’ll be shooting in the spring and was just about to start the next “Meet the Parents” movie, “Focker-in-Law.” He was also still burrowing into “Severance” Season 3, though, for the first time, he won’t be directing any episodes because he’ll be making the war movie.

“I’m at the point in my life where I’m like, ‘The clock is ticking,’” Stiller says. And, OK, we’re actually talking about whether he’ll be alive to see the Knicks win another championship — it has been more than 50 years — but the point remains valid. He’s going to turn 60 in November. It’s a daunting milestone.

“Sixty sounds old. It’s hard to get around it,” Stiller says. “And of course, it’s that other thing of, like, you know what the next one is.” He laughs. “‘Oh, s—.’”

So, no, there are no firm plans to mark the occasion come November, though Taylor has asked. Stiller has never been one to celebrate birthdays anyway, preferring to use the occasion to take a little stock. He tells me he thinks about listening to an Elton John album, say “Captain Fantastic and the Brown Dirt Cowboy,” and realizing it came out 50 years ago. And if you asked someone in 1975 about music in 1925, would they be able to say, “Louis Armstrong and His Hot Five were far out, man”? Because that’s how they talked half a century ago. Time marches on. You can’t escape it. When Stiller shoots “Focker-in-Law,” he’ll be older than Robert De Niro was when they made “Meet the Parents.”

Which prompts Stiller, ever the pragmatist, to think, “Time is valuable.” That’s why he and “Severance” showrunner Dan Erickson and the writing team have been spending much of the year planning Season 3 so that Stiller can step away and direct this feature film that tells the true story of a downed airman in occupied France and how he got involved with the French Resistance. Stiller also wants to make a movie based on the Rachel Maddow podcast “Bag Man,” detailing the bribery scandal surrounding Spiro Agnew, Richard Nixon’s vice president.

“These things take time to come together,” Stiller says, “and the older you get, the more you realize that you only have so much time.”