Over the past 15 years, the landscape of television has changed drastically, but one show has been there through it all: "NCIS."
Through three presidents, two decades, and many drastic cast changes, "NCIS" has consistently remained a ratings powerhouse. It's been the most popular show on TV for years, and its stars are consistently fan favorites. Not surprisingly, it was renewed for a season 16 in April 2018.
Throughout its 350 episodes, some familiar faces have come into the team's orbit, like Michelle Obama, Zac Efron, Abigail Breslin, and Millie Bobby Brown. Keep scrolling to see if you can remember 15 seasons worth of famous guest stars.
Warning: Spoilers ahead for those who haven't watched all 15 seasons.
Michelle Obama cameoed as herself to promote her charity Joining Forces, an organization dedicated to supporting service members, veterans, and their families.
One of the executive producers of "NCIS," Gary Glasberg, revealed an important milestone about the episode. "We're the first dramatic film production to actually film in the White House," Glasberg said.
Just three days before "High School Musical" premiered, Zac Efron appeared in a season three episode.
Efron's episode, "Deception," aired on January 17, 2006. Three days later, on January 20, pop culture was forever changed when "High School Musical" premiered on the Disney Channel, spawning two sequels and a nation-wide tour.
Jamie Lee Curtis has appeared in multiple episodes as Dr. Samantha Ryan, one of special agent Leroy Jethro Gibbs' girlfriends.
Curtis and Harmon (Gibbs) had played love interests before — in 2003 comedy "Freaky Friday."
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