Alien Sharks has been a staple of Shark Week programming for five years now. So Shark Week 2018 kicks off with a greatest hits episode of some of the strangest sharks out there in the deep.

U.S. audiences can currently catch Bear Grylls leading celebrities on dangerous trips for Running Wild With Bear Grylls on NBC. But for Shark Week's 30th anniversary, the Man Vs. Wild adventurer is returning to the channel that made him a star in America. And as the above video shows, Grylls will be up to his usual jaw-dropping (jaws-dropping?) survivor stunts.

The star power continues when Shaquille O'Neal joins Shark Week — or, as he would have preferred it to be, "Shaq Week" — with a little assistance from Rob Riggle.

Remember when Michael Phelps "raced" a shark last year? Well, 2018's stunt has mixed martial artist Ronda Rousey facing off with a mako shark. Just like Phelps didn't really race a shark, don't expect Rousey to actually fight a shark. But she will dangerously attempt to swim with sharks outside of a cage.

The celebrities don't stop after the first night of Shark Week. In Monster Tag, athletes Aaron Rodgers, Lindsey Vonn, and Rob Gronkowski join forces with scientists to discuss the importance of shark conservation.

Dr. Mauricio Hoyos, shark diver Jimi Partington, and wildlife cinematographer Andy Casagrande go into the waters of Guadalupe Island to see if great white sharks are bigger the deeper they go.

The 2015 special, Tiburones: The Sharks Of Cuba, covered how one of the largest sharks ever recorded was the great white El Monstruo, who was found in Cuba in the 1940s. The nation hasn't allowed international researchers to explore its waters for years, but two teams were given permission and they'll see if they can find another shark as big as El Monstruo in Cuba's Secret Shark Lair.

Guy Fieri and his son Hunter trade in eating food for possibly becoming the food when they go diving with sharks.

Liz Parkinson, Mike Dornellas, Nick LeBeouf, and Casagrande look into what humans do that may cause sharks to attack. They also reenact five real-life scenarios to find the best ways to survive, so you can pick up a few tips.

As Australia's edition of National Geographic reported, multiple great white sharks were found dead on the shores of South Africa in 2017 with their livers (and sometimes hearts) removed. Biologist Alison Towner believes that orcas are to blame for these killings. In order to save the sharks, she joins conservationist Chris Fallows and filmmakers Jeff Kurr and Casagrande to investigate.

Fallows and Kurr created the Shark Week staple Air Jaws, which features great whites in South Africa jumping out of the water as they attack seals. Due to what The Hunted will show with orcas killing great whites, Fallows and Kurr try to find another location for Air Jaws in New Zealand for Back From The Dead.

In the ultimate TV shark crossover, Shark Tank entrepreneurs Mark Cuban, Daymond John, Barbara Corcoran, and Kevin O'Leary are each teamed up with shark conservation non-profits. Then they must pitch other business Sharks, including Robert Herjavec, to convince them that their non-profit deserves a $50,000 donation. So this special will be about shark-invested waters more than shark-infested waters.

SharkCam returns to look into the activities of bull and hammerhead sharks in the Bahamas.

SharkCam has been a part of Shark Week since 2013's Return Of Jaws, so this special looks back on some of the best — and scariest— moments over the years.

For Sharkwrecked, Paul de Gelder (a shark attack survivor) and James Glancy spend two days in shark-infested waters with no water, food, or sleep. Discovery calls it the "most dangerous stunt Shark Week has ever undertaken," so it's bound to be intense.

In the waters of the Galapagos Islands, tiger sharks are an invasive species who just appeared in the last decade. Dr. Neil Hammerschlag, cameraman Joe Romeiro, and local expert Alex Hearn document how the tiger sharks are impacting the ecosystem.

As CNN noted, Discovery Channel's original Megalodon special in 2013 was controversial since the faux documentary was far from scientific. And in 2015, Deadline reported that the Discovery Channel chief said that Shark Week would no longer contain these fake programs. So this time around, Discovery tries a more fact-based approach to what would happen if the prehistoric shark still existed. There's also a tie-in with the new movie The Meg.

One of the inspirations for Jaws is said to be the real great whites that existed in the waters off Montauk, as The New York Times outlined in its review of the book In the Slick of the Cricket. So Dr. Craig O'Connell heads to Long Island with a team to see if there are any ancestors of those great whites there.

Dr. Mauricio Hoyos, Dr. Toby Daly, and Michelle Wcisel follow pregnant great white sharks from Guadalupe to Baja to find their birthing ground.

Kurr and Casagrande have looked for "mega sharks" — the largest great whites in the world — before and they'll return to New Zealand for another go at finding these giants.

As Shark Week winds down, this special will take a look at the biggest news stories and scientific updates on sharks over the past year. Interestingly enough, Shark Week joked about the title Sharks Gone Wild in 2011 after Stephen Colbert proposed a "Shark Boob Week."

For Shark Week's grand finale, five all-stars from Discovery's show Naked And Afraid add on the horror of also being with sharks for 14 days.

Even with all of this programming, Shark Week will be gone in the flash of a fin, so make sure you catch the wave while you can.