NOW A STORY ABOUT THREE BROTHERS, A BOAT, AND THOUSANDS OF MILES OF OCEAN.

THE BROTHERS ARE THE MACLEANS FROM SCOTLAND AND THEY'RE IN THE FINAL STRETCH OF THEIR ATTEMPT TO ROW NONSTOP ACROSS THE PACIFIC FROM PERU TO AUSTRALIA.

THEY'RE GOING FOR MORE THAN JUST A WORLD RECORD.

THEY'RE RAISING MONEY FOR CLEAN WATER PROJECTS IN EAST AFRICA.

> WOO!

JOHN: IN APRIL, BROTHERS EWAN, JAMIE AND LACHLAN MACLEAN SET OFF FROM LIMA.

THEIR DESTINATION -- THE EAST COAST OF AUSTRALIA, 9,000 MILES ACROSS THE PACIFIC, WITHOUT STOPPING AND WITHOUT ANY SUPPORT.

NO SAILS, NO ENGINE - JUST OARS.

AND THEY'RE NOT USING JUST ANY ROWBOAT.

THEY HELPED DESIGN THE 600-POUND VESSEL, WHICH USES FORMULA ONE RACING TECHNOLOGY.

THEY NAMED IT ROSE EMILY TO HONOR THEIR SISTER WHO WAS LOST DURING PREGNANCY.

WHEN THEY'RE NOT ROWING, THEIR ROUTINES INCLUDE FISHING, COOKING, AND HOLDING VIRTUAL DINNERS WITH CELEBRITIES, LIKE FLEA OF THE RED HOT CHILI PEPPERS AND ACTORS EWAN MCGREGOR.

EWAN MCGREGOR: I'M SURE WHERE YOU ARE RIGHT NOW IS AS CLOSE TO BEING LIKE THE PINNACLE OF ADVENTURES YOU COULD EVER BE!

JOHN: AND MARK WAHLBERG.

MARK WAHLBERG: I COULD PLAY YOU IN A MOVIE.

>> THEY ARE CROSSING 9000 MILES.

JOHN: THEY EVEN MADE A VIRTUAL APPEARANCE AT A ROCK CONCERT IN SAN DIEGO.

JOINING THE BAND THE ALL-AMERICAN REJECTS, FEATURING JAMIE ON BAGPIPES.

LIGHT MOMENTS THAT OFFER A RESPITE FROM THE DANGERS THEY FACE.

>> WE ARE CAUGHT IN A STORM.

JOHN: WHILE THEIR BODIES HAVE TAKEN A BEATING THEIR SPIRITS , HAVE BEEN BUOYED BY THE THOUSANDS OF PEOPLE AROUND THE WORLD TOWARD FOLLOWING THEIR JOURNEY ON SOCIAL MEDIA AND CONTRIBUTING TOWARD THEIR GOAL OF RAISING MORE THAN $1 MILLION TO PROVIDE CLEAN WATER FOR 40,000 PEOPLE IN MADAGASCAR.

I SPOKE WITH THE BROTHERS WHEN THEY WERE ABOUT 500 MILES FROM AUSTRALIA.

LACHLAN KEPT ROWING WHILE JAMIE AND EWAN EXPLAINED HOW THE IDEA TO CROSS THE PACIFIC CAME TO THEM FIVE YEARS AGO WHILE THEY WERE ROWING ACROSS THE ATLANTIC.

>> WHILST WE WERE OUT AT SEA ON THE ATLANTIC, I THINK WE ALREADY KNEW THAT WE WANTED TO DO ANOTHER ROW.

THE THREE OF US, WE GOT A BIT OF A BUG FOR IT.

WE SET OUT A CHARITY TO RAISE MORE FUNDS FOR PEOPLE.

I THINK ABOUT TWO YEARS AGO, WE LOOKED AT EACH OTHER AND THOUGHT I THINK IT'S TIME FOR ANOTHER BIG ONE, HOW DO WE FUND RAISE THE BEST WAY WE KNOW HOW?

WE CAME UP WITH THE BIGGEST OCEAN THAT'S OUT THERE.

AIM FOR THE PACIFIC.

JOHN: THE BIGGEST OCEAN.

WHAT IS AN AVERAGE DAY LIKE FOR YOU GUYS?

>> EVERYONE IS UPSET ABOUT HALF 5:00, 6:00 A.M.

THERE'S ALWAYS SOMEONE ON THE OARS.

GENERALLY WE HAVE A TWO ON AND ONE OFF.

AN HOUR ON AND THEN AN HOUR OFF.

IT'S NOT REALLY A BREAK TO BE HONEST.

YOU ARE CONSTANTLY HAVING TO DO ORK.

FUEL YOURSELF, REHYDRATE, DO BOTH JOBS, CLEAN, DO SOME MEDIA THINGS AND THEN YOU ARE BACK ON THE OARS.

THAT HAS BEEN OUR ROUTINE FOR 132 DAYS.

OHN: THE ORIGINAL PLAN WAS TO HIT AUSTRALIA ON DAY 120.

WHAT HAPPENED AND HOW HAVE YOU HAD TO ADJUST?

>> THE LAST 2000 NAUTICAL MILES HAVE BEEN PARTICULARLY DIFFICULT.

WE HAVE BEEN HIT WITH WEATHER SYSTEM AFTER WEATHER SYSTEM.

THE MAIN RESULT WAS WE GOT PUSHED NORTH AND NORTH AND NORTH.

WE ARE HAVING TO DUCK BEHIND ISLANDS TO HIDE FROM THE STORMS FROM THE WEATHER SYSTEMS THAT WANT TO PUSH US BACKWARDS.

LITTLE BY LITTLE, SLIT -- SYDNEY SLOWLY SLIPPED OUT OF OUR GRASP AND WE HAD TO MAKE THE CALL A FEW WEEKS AGO THAT IT WAS UNTENABLE AND IT WAS NOT PHYSICALLY GOING TO BE POSSIBLE.

SO WE OPTED TO BRISBANE AND THEN WE GOT HIT BY ANOTHER CYCLONE.

SO WE HAVE LANDED ON KAREN'S -- CAIRNS.

WE THINK IT'S DOABLE.

JOHN: YOU REFER TO THE PHYSICAL EXERTION AND STREAM.

HOW DID YOU PREPARE?

>> IT WAS ABOUT A YEAR AND A HALF OF PHYSICAL PREPARATION.

THAT PROGRAM WAS PUT TOGETHER BY A LADY WHO USUALLY DESIGNS PROGRAMS FOR ASTRONAUTS SPENDING TIME IN ZERO GRAVITY TO SIX MONTHS.

YOU CAN'T QUITE EXPERIENCE CONDITIONS LIKE THIS, ROLLING SEAS ON THE WEST COAST OF SCOTLAND, BUT TIME ON THE OARS ADDS UP AND THEN IT'S A COUPLE HOURS IN THE GYM EACH DAY.

QUITE A LOT OF MENTAL PREPARATION AS WELL.

IT'S A REAL CHALLENGE IN RESILIENCE.

NOT JUST YOUR PHYSICAL ABILITY TO DO IT, BUT MENTALLY STAYING POSITIVE, KEEPING MOREL UP.

JOHN: WHAT HAS BEEN YOUR WORST DAY SO FAR?

>> WE GOT HIT BY THIS ANTICYCLONE AND AN INTENSE WAVE.

WE JUST GOT ABSOLUTELY BATTERED BY THIS WEATHER SYSTEM.

>> I SAW THIS WAVE, LIKE A WALL OF WATER, LIKE 25 FEET VEERING UP OVER THE BOAT.

IT WAS BARRELING, JUST AS IT WAS CRESTING INTO THE BOAT.

WE WERE QUITE NEAR TONGA AT THE TIME AND I THINK IT WAS LIKE BEING SPEARED BY A TONGAN RUGBY PLAYER.

IT TOTALLY OVERWHELMED ME, PUSHING ME TO THE STAR BOARD SIDE OF THE BOAT.

MY UPPER HALF WENT OVER AND MY LEGS JUST FLIPPED.

IT WAS LIKE A BACKWARDS SOMERSAULT.

AND THEN I WAS INTO DARKNESS.

I DIDN'T KNOW WHAT WOULD HAPPEN AND I DID NOT KNOW IF THE BOAT CAPSIZED.

FORTUNATELY I WAS TETHERED ONTO THE BOAT.

THAT SAVED MY LIFE.

I WOULD HAVE BEEN LOST 100%.

>> EWAN WAS ON THE OARS, AND HE PULLED HIM BACK UP BUT IT WAS A BIT OF A RUDE AWAKENING OF HOW AT THE MERCY OF THE OCEAN WE ARE AND HOW VISIT -- VISUALLY WE HAVE TO BE ABOUT OUR SAFETY EQUIPMENT.

JOJO: THERE ARE HUNDREDS OF THOUSANDS OF PEOPLE AROUND THE WORLD FOLLOWININYOUR PROGRESS.

WHAT DOES THAT MEAN TO YOU?

>> WE WEREN'T SURE WHETHER THE STRATEGIES WE WERE GOING TO VENT WERE GOING TO WORK, WHETHER PEOPLE WOULD GET BEHIND IT AND GET BEHIND THE CAUSE THAT WE WHOLEHEARTEDLY BELIEVE IN.

IT HAS BEEN INCREDIBLE TO SEE THAT GENTLY BUILD AND MESSAGES OF SUPPORT.

OF COURSE THAT TRANSLATING INTO DONATIONS TO FUEL THE SUPPORT FROM PEOPLE ALL OVER THE WORLD.

IT REALLY DOES HELP YOU GET THROUGH SOME REALLY TOUGH DAYS OUT ON THE OCEAN.

OHN: WHAT HAVE YOU MISSED ABOUT BEING ON LAND?

>> IT'S REALLY THE HOMELY COMFORTS THAT YOU MISS.

WE LIVE OUR DAY-TO-DAY LIVES OUT HERE THAT ARE UNCOMFORTABLE.

I'M LOOKING FOR -- FORWARD TO MY FIRST PIZZA ON LAND.

IT, BEER, WARM SHOWER.

AND THEN I WILL TALK MYSELF INTO BED.

[LAUGHTER] JOHN: THAT SOUNDS PRETTY GOOD.

DO YOU THINK THERE IS SOMETHING YOU WILL MISS ABOUT BEING OUT ON THE OCEAN?

>> DEFINITELY.

THERE WILL BE A SMALL PART OF YOU THAT YEARNS FOR THIS SORT OF ADVENTURE.

THE ISOLATION CAN BE A POSITIVE THING.

WITH THAT COMES A SORT OF CLARITY YOU DON'T HAVE A LAND.

YOU'RE NOT CONSTANTLY PESTERED BY PEOPLE TEXTING YOU, EMAILING YOU, BOMBARDED BY SOCIAL MEDIA.

IT IS A PEACEFUL EXISTENCE.

WE WILL MISS THE SIMPLE ASPECTS OF LIFE OUT HERE FOR SURE.

JOHN: NOW THAT YOU'VE CROSSED THE ATLANTIC, YOU WILL HAVE CROSSED THE PACIFIC IN A FEW DAYS.

WHAT CHALLENGE IS LEFT?

>> WE ARE REALLY INVOLVED WITH THE AID SIDE.

WE WILL WORK WITH OUR PARTNER CHARITY OUT OF MADAGASCAR.

THAT'S A HUGE PROJECT IN ITSELF, 100 30 DIFFERENT SITES LOOKING AT ACCESS TO CLEAN WATER SO THAT WILL BE AN AMAZING THING TO BE INVOLVED IN AND I THINK THAT WILL BE OUR FOCUS COMING OUT OF THIS.

AFTER THAT, WE HAVE LOVED THIS EXPERIENCE, IT'S BEEN TOUGH TIMES.

I THINK OUR GIRLFRIENDS HAVE BEEN PRETTY UPSET WITH THOSE THAT WE WOULD DECIDE TO SPEND ANOTHER SIX MONTHS AWAY.

I THINK WE WOULD DO SMALLER THINGS BUT THERE'S MORE TO COME.

JOHN:THANK YOU VERY MUCH, AND GOOD LUCK IN THE DAYS AHEAD.

>> THANK YOU SO MUCH FOR HAVING US ON.

APPRECIATED.