The TBS show’s fourth season debuts on June 18, and things have only gotten more outrageous since then. The long and short of it is that the family went on vacation, unintentionally found themselves on the run from the law, and things just escalated from there — a plot far too twisty and convoluted (for comedic effect) to spell out entirely. Just know what began as a road-trip comedy now spans the globe and involves battle tanks in place of urine jars. When Zea hears that a reporter has binged the new season in two sittings, she quips, “That’s a lot of 'Detour’ at once. Are you okay?!”

That might make the sitcom sound like shock comedy along the lines of “It’s Always Sunny in Philadelphia” or “South Park,” but it’s actually one of the most pro-family stories that exists in a television landscape peppered with murdered women, disaffected sex and ruthless power-grabbing. Every horrid situation that arises — from faked deaths to so many bloody noses to a cavalcade of broken international laws — is, in the end, about the Parkers attempting to remain the close-knit family they are.

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“When we got into this, the network really wanted this family comedy. But I had not a lot of interest in making a traditional family comedy,” said Jones, who envisioned a show that would propel a family “into pure chaos” — to “bend a family as far as you can without breaking it.” Ruining a family isn’t funny, but as the past three seasons demonstrate, it can be pretty hilarious to put one under a tremendous amount of stress.

“The family has this loving bond, and they can fight and bicker, but that fab four are kind of unbreakable,” Jones added. As it happens, it’s a family-run show — co-created and written by Jones and his wife Samantha Bee, with whom he has also worked on “The Daily Show” and “Full Frontal with Samantha Bee.”

The new season finds Nate, Robin and Jared looking for Delilah, who, sick of the family’s antics, has run away and become a social media star, posting videos of herself dancing at various locales around the globe. Her family chases her from Paraguay (where they stumble upon a drug cartel’s hideout ringed with heads on sticks [cue the laugh track]) to Tibet (where Nate falls down a mountain and a now-teenage Jared falls for a local girl who he doesn’t realize is 10 years old) to Japan (“We don’t talk about what happened in Japan”).

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Along the way, we meet evil twin sisters who lock up men and mine them for testosterone, and Russian oligarchs who maintain power by feeding Putin his favorite milk.

Though it may sound either dark or dumb, “The Detour” is one of the funniest shows on television. Strangely, it’s also one of the more introspective ones, tackling everything from abortion to disability to the finer plot points of “The Perfect Storm” in its own twisted way.

“I think if you have an honesty and respect for character, in this case the character being the family, you can go anywhere with them,” Jones said. Added Zea, “It is sometimes offensive. It sometimes crosses a line in term of what people are comfortable with. But it’s also the truth.”

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That’s not to say making it is always a breeze, especially since it involves two child actors. When they come up with their more outlandish ideas, the first conversation is “always awkward,” according to Jones.

In season three, for example, Gerasimovich’s character, who is in her early teens, “was having a full orgasm on a snowmobile." That, says Jones, “was first an awkward conversation with her mom." He has a practice of running all plot points past the actress’s parents; on this one, “there was a loooooooong pause on the phone — and then ‘I think that would be okay.’”

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Oddly, though, the show has caught the most flack not for its boundary-pushing comedy but for being too “political,” in the eyes of some critics on the right. In truth, the show revels in skewering both sides, taking more shots at Robin’s atheism than Nate’s faith, for example. Jones thinks the criticism may stem from Bee’s involvement: “Some people see her name and immediately bristle. . . . But I always enjoyed mocking both sides. I find liberals just as fun to make fun of.”