MyNetworkTV is playing the high-definition remasters of 1990s The X-Files every Thursday.
http://www.mynetworktv.com/shows/x-files
MyNetworkTV should be available on the channels listed below.
I can confirm New York and Boston, because I have WWOR and WSBK as superstations. WWOR shows them from 8PM to 10PM. WSBK shows them from 9PM to 11PM.
Except for St. Louis, every affiliate on this list should broadcast in high definition.
This is a partial list. Smaller markets also have MyNetworkTV affiliates.
Code:New York City Channel 9.1 WWOR-TV
Los Angeles Channel 13.1 KCOP-TV
Chicago Channel 50.1 WPWR-TV
Philladelphia Channel 17.1 WPHL-TV
Dallas Channel 27.1 KDFI
San Francisco Channel 4.1 KRON-TV
Boston Channel 38.1 WSBK-TV
Atlanta Channel 36.1 WATL
Washington DC Channel 20.1 WDCA
Houston Channel 20.1 KTXH
Detroit Channel 20.1 WMYD
Phoenix Channel 45.1 KUTP
Seattle Channel 22.1 KZJO
Tampa Channel 38.1 WTTA
Minneapolis Channel 9.2 WFTC
Miami Channel 33.1 WBFS-TV
Denver Channel 20.1 KTVD
Cleveland Channel 43.1 WUAB
Orlando Channel 65.1 WRBW
Sacremento Channel 58.1 KQCA
St. Louis Channel 4.3 KMOV-DT3 (NOT hi-def, DVD resolution, widescreen)
Portland, OR Channel 49.1 KPDX
Pittsburgh Channel 22.1 WPNT
Baltimore Channel 24.1 WUTB
Indianapolis Channel 23.1 WNDY-TV
San Diego Channel 49.1 XHDTV-TDT
Nashville Channel 30.1 WUXP-TV
Kansas City Channel 62.1 KSMO-TV
Salt Lake City Channel 2.2 KUTV-DT2
Cincinnati Channel 64.1 WSTR-TV
Milwaukee Channel 24.1 WCGV-TV
San Antonio Channel 2.1 KCWX
Las Vegas Channel 33.2 KVCW-DT2
Austin Channel 14.1 KBVO-CD
Oklahoma City Channel 52.1 KSBI
Albuquerque Channel 50.1 KASY-TV
Jacksonville Channel 30.2 WFOX-DT2
Buffalo Channel 49.1 WNYO-TV
New Orleans Channel 54.1 WUPL
Honolulu Channel 9.1 KFVE