E145 CREW OVERSHOT THE TURN TO FINAL ON RWY 26R AT ATL.

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MY FO AND I WERE ON A VECTOR TO JOIN THE ILS RWY 26R AT ATL. THE FO WAS THE PNF AND WAS IN CHARGE OF FINISHING ALL THE CHKLIST. THE APCH CHK WAS CALLED FOR AND COMPLETED. UNKNOWN TO ME; THE FO ONLY 'TUNED AND IDENTED' HIS RADIOS. THE ILS RWY 26R FREQ WAS STILL IN STANDBY ON MY RADIOS. HE FAILED TO COMPLY WITH THE CHKLIST AND I FAILED TO VERIFY HIS WORK. AS WE WERE FLYING ON OUR VECTOR AND HAD BEEN CLRED FOR THE APCH; THE FO'S LOC COURSE CAME ALIVE AND WE FLEW RIGHT THROUGH THE COURSE WITHOUT HIM SAYING A WORD. I HAD THE WRONG FREQ IN THE #1 RADIO AND WAS WAITING FOR MY COURSE TO COME ALIVE WHEN ATC INFORMED US WE HAD JUST FLOWN THROUGH OUR COURSE. MY FO IMMEDIATELY AGREED THAT WE HAD DONE SO JUST AS I REALIZED WHAT HAD HAPPENED. ATC GAVE US A HDG TO REINTERCEPT AND WE WERE CLRED FOR A VISUAL APCH TO RWY 26R. WE LANDED WITHOUT INCIDENT; AND WE CAUSED NO DEV TO OTHER ACFT. AS PIC; I FEEL THE 2 THINGS THAT CAUSED THIS DEV ARE: 1) FO'S FAILURE TO COMPLETE THE APCH CHKLIST AS WE WERE TRAINED AND MY FAILURE TO ENSURE I HAVE THE PROPER FREQ IN THE #1 RADIO. 2) FO'S UNWILLINGNESS TO SPEAK UP AS WE FLEW THROUGH OUR LOC COURSE. IT WAS OUR VERY FIRST TRIP TOGETHER AND HE MAY NOT HAVE FELT LIKE HE COULD CORRECT ME. WE HAD A LACK OF COM. SUPPLEMENTAL INFO FROM ACN 516095: GIVEN A 'SQUARE TURN TO FINAL' WHILE PARALLEL APCHS BEING CONDUCTED AT ATL. AUTOPLT DID TERRIBLE JOB OF INTERCEPTING; AND I TOOK CTL WHEN WE HAD OVERSHOT FINAL. PARALLEL APCHS IN USE; NO TCASII ADVISORIES. I OVERSHOT RWY 26R INSIDE THE MARKER AND CROSSED RWY 26L; BUT DID NOT INTERFERE WITH APCHS ON RWY 27L. MINS LATER; I WAS GIVEN A SIDESTEP TO RWY 26L AND LANDED UNEVENTFULLY.