A PAX ON AN MD80 WAS INJURED BY A THROWN BOTTLE. THE CAPT WAS ASCERTAINING THE CONDITION OF THE PAX; TALKING TO DISPATCH; AND PERFORMING COCKPIT TASKS; WHEN THE FO OVERSHOT THE LOC. APCH CTLR INTERVENED AND VECTORED THE ACFT BACK ONTO THE LOC.

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DURING DSCNT THROUGH FL200; THE CAPT WAS NOTIFIED THAT A PAX WAS INJURED BY A THROWN BOTTLE. OVER THE NEXT FEW MINS HE WAS ASCERTAINING THE CONDITION OF THE PAX AND CALLING DISPATCH SO HE WAS NOT LISTENING TO ATC. ATC CLRED US ON A HDG TO INTERCEPT THE RWY 14R LOC FROM OVER 30 NM OUT. THEN ATC GAVE US 2 VECTORS AND A REINTERCEPT OF THE LOC. WHEN ATC THEN GAVE US ANOTHER HDG TO REINTERCEPT THE LOC; I REALIZED THAT I HAD FLOWN THROUGH IT. AT ABOUT THIS TIME THE CAPT BEGAN LISTENING TO ATC AGAIN. EVEN THOUGH I REMEMBER ARMING THE LOC CAPTURE MODE THE FIRST TIME; I MUST HAVE FORGOTTEN TO REARM FOR THE SECOND CAPTURE. THE EARLY HOUR; THE CONFUSION CONCERNING THE PAX; AND THE MULTIPLE ATC COMMANDS ALL HELPED CONTRIBUTE TO THIS SIT OCCURRING. I DO NOT BELIEVE WE FLEW THROUGH THE LOC VERY FAR OR THAT WE HAD A CONFLICT WITH ANY OTHER ACFT. SUPPLEMENTAL INFO FROM ACN 326570: I WAS OFF THE MAIN FREQ (ORD APCH). MY FO TOLD ME THAT WHILE I WAS BUSY WITH ATIS; HE HAD FLOWN THROUGH THE LOC; AND AFTER A MIN; ORD APCH GAVE HIM ANOTHER HDG TO REINTERCEPT. I WOULD NOT HAVE KNOWN IF HE HAD NOT TOLD ME.