Season 37 Pre-emptions and Anomalies

• Tuesdays (through 12/24): WKRN Nashville (12:07 AM Central)
  
• Thursdays (through 12/12): Most FOX affiliates (see here)
• Fridays (through 1/3): WBZ Boston (2:06 AM Eastern)

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Cumulative chart of all Season 37 episodes pre-empted network-wide, in Top 20 Nielsen markets, or markets with O&O affiliates, and when or if the episode reran (will be updated through September 2021):


NOTES:
^[1] KGO San Francisco aired Teacher's Week on a one-day delay starting Tuesday 9/10.
^[2] Due to the error, WBFF Baltimore properly aired the 10/8 episode on Saturday 10/12, though it was listed as Family Guy.
^[3] CHEK Vancouver aired the 10/21 episode an hour early at 6:00 PM Pacific.
^[4] The 11/13 episode was pre-empted on all ABC O&O's carrying Wheel plus WTNH New Haven, WKRN Nashville, and KMID Midland.
^[5] KABC Los Angeles aired Wheel on a one-day delay from Tuesday 11/19 through Saturday 11/30.
^[6] The 12/4 episode was pre-empted on the following: WLTV Jacksonville, WETM Elmira, WKTV Utica, WVIR Charlottesville, and KNSD San Diego.
^[7] The 12/18 episode was affected on all East Coast ABC affiliates, some East CBS's, most NBC's, and FOX affiliate KDVR Denver.
^[8] The 1/2 episode was pre-empted on the following: WIVB Buffalo (CBS), WETM Elmira (NBC), and WROC Rochester (CBS).
^[9] 7:00 PM Eastern airings of the 1/8 episode were pre-empted through Round 2 on CBS and NBC affiliates.
^[10] The Bonus Round of the 1/8 episode was pre-empted on 7:30 PM Eastern/6:30 Central airings on NBC affiliates.
^[11] Known stations that pre-empted the 1/21 episode: WPBF West Palm Beach, WWLP Springfield, KCEN Temple.
^[12] WTVD Raleigh aired the 2/21 episode on Saturday 2/22 due to Thursday's pre-emption delaying the 2/20 and 2/21 episodes by one day.
^[13] Election updates resulted in the show not beginning until the contestant interviews on 7:00 and 7:30 Eastern airings.
^[14] The 3/3 episode was also pre-empted on the three Pacific ABC O&O's and four Pacific NBC's: KNSD, KSBW, KSBY, and KHQ.
^[15] WFTV Orlando aired the 3/17 episode on Saturday 3/21, but the first Toss-Up was pre-empted by breaking news on the Orange County Jail hostage.
^[16] Known stations that pre-empted the 3/23 episode: WPBF West Palm Beach, WLKY Louisville, WBFF Baltimore.
^[17] WPVI Philadelphia aired Surfin' Safari week on a one-day delay starting Thursday 4/23.
^[18] The 4/23 episode was also pre-empted on the following: WBZ Boston, WIVB Buffalo, WROC Rochester, WAPT Jackson, WKRN Nashville.
^[19] Several ABC affiliates aired the 4/24 episode on Saturday 4/25, but many airings were partially pre-empted due to overrun from the NFL Draft.
^[20] The 4/28 episode was pre-empted on the following: WTEN Albany, WIVT Binghamton, WIVB Buffalo, WETM Elmira, WROC Rochester.
^[21] WTVD Raleigh reran the 2/20 and 2/21 episodes on 6/12 and 6/13, a day behind other stations, due to a weather special pre-emption on 6/10.
^[22] WFTV Orlando aired the 8/6 episode an hour early at 6:30 PM Eastern on sister station WRDQ.