'NCIS Hawai’i' Cast Members Go Live During Latest Episode, Accidentally Spoil A Major Plot Line

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It's not every day that a celebrity accidentally issues a spoiler alert a little too late, but that's precisely what happened on Instagram earlier this week.

NCIS: Hawai'i stars Vanessa LacheyYasmine Al-Bustami, and Mark Gessner joined fans tuning into the show's most recent episode for some lighthearted fun in an unofficial streaming party. But in the process, the three unknowingly tipped fans off to what's to come in future episodes. 

So, consider this your final spoiler alert warning. If you want to be surprised by the producer's plans for upcoming shows, exit this article now—may I suggest checking out some other trending stories instead?

For those of you miserable enough to spoil the future for yourself, welcome to the club. Here's what you missed:

Lachey, 41, and Al-Bustami, 33, headed to Instagram Live to react to the drama—something the actresses admitted they never do because of scheduling conflicts—that unfolded in an episode that aired on Oct. 10, titled "Primal Fear." 

The stars' reaction video was later shared as a grid post on Lachey's Instagram account, no caption needed. 

View the original article to see embedded media.

While online, they decided to invite Gessner, 42, to the party—and that's when the slip-up happened. 

After struggling to invite Gessner to the live for well over three minutes, Lachey and Al-Bustami finally managed to get their co-star on the screen. While explaining that the two actresses were in Los Angeles without Gessner, Lachey asked Gessner to disclose his location to fans. 

"You're in Hawai'i; we're in LA; this is weird," Lachey stated as she motioned her hand to symbolize a sort of role reversal. 

"It doesn't make any sense," Gessner replied before Al-Bustami interjected, "no, not even a little bit!" 

After a bit of back and forth between Lachey (who was jealous of her two co-stars for going out while she stayed home with her kids) and Al-Bustami, Lachey lovingly demanded Gessner spill where he was. 

"Mark, tell everybody on Instagram right now where are you so they can come find you," she joked. 

"Okay, I'm in Waikiki, Hawai'i, excited to shoot tomorrow for NCIS: Hawai'i Episode 210," Gessner revealed. 

Realizing what just happened, Lachey tried to move on but couldn't without addressing the slip-up she had just created. 

"The fact that you're there shooting right now could be a spoiler alert–did we not do this correctly," Lachey said with a smirk, biting her lip. 

Al-Bustami, a little late to the party, didn't understand her co-star's concern, "Wait, no, why is it a spoiler alert?"

"He just got poisoned on the episode happening right now, and maybe people watching are going: 'is he dead?'" 

After a few laughs, Lachey concluded: "I'm probably going to get a call from CBS tomorrow."

From the looks of it, CBS and the showrunners didn't mind the slight spoiler. 

"This was AMAZING. 👏," cheered the official NCIS: Hawai'i Instagram account.

Similarly, the network wrote: "Obsessed." 

NCIS: Hawai'i airs Mondays at 10 p.m. ET via CBS and streaming on Paramount Plus

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