What we're watching: We missed out on Brokeback Mountain last night, so we'll let our sensitive side out for a bit with chick flick tragic love story Tristan & Isolde. On NBC, Heroes begins a story arc that jumps back six months, so maybe we'll get some clue what is really going on and what happened to time-traveling Hiro. Otherwise, you can always spend an evening with Ted Koppel & the Discovery Channel as he focuses on Iran.

Our traditional high-def listings continue below.
Here are some other HDTV programs showing on selected networks today. All times are Eastern and reruns are in italics:

ABC (720p): Nada.

CBS (1080i): How I Met Your Mother (8 p.m.), The Class (8:30 p.m.), Two and a Half Men (9 p.m.), New Adventures of Old Christine (9:30 p.m.), CSI: Miami (10 p.m.), The Late Show with David Letterman (11:35 p.m.)

NBC (1080i): Heroes (9 p.m.), Studio 60 on the Sunset Strip (10 p.m.), The Tonight Show with Jay Leno (11:34 p.m.)

Fox (720p): Prison Break (8 p.m.), House (9 p.m.)

CW (1080i): Everybody Hates Chris (8 p.m.), All of Us (8:30 p.m.), Girlfriends (9 p.m.), The Game (9:30 p.m.)

MYNTV (1080:): Desire (8 p.m.), Fashion House (9 p.m.)

Discovery-HD (1080i): Plant's Best Australian Wildlife Adventures (7 p.m.), Risk Takers (8 & 11 p.m.), An Inside Look: Return of the Buffalo (9 p.m.), Koppel: Iran - The Most Dangerous Nation (10 p.m.)

TNT-HD (1080i): Law & Order (6, 9 & 10 p.m.), Without a Trace (7 & 8 p.m.), Cold Case (11 p.m.)

ESPN-HD (720p): NFL Primetime (6 p.m.), Monday Night Countdown (7 p.m.), Monday Night Football: Packers vs. Seahawks (8:30 p.m.), SportsCenter (11:30 p.m.)

ESPN2-HD (720p): College Basketball: Michigan vs. NC State (7 p.m.)

INHD (1080i): London Live (6 & 6:30 p.m.), NHL on Versus: Stars at Red Wings (7 p.m.), Action Sports World Tour: Richmond (10 p.m.), Bears (11 p.m.)

INHD2 (1080i): Caribbean Escapes (7 p.m.), Wine Trails Italy (7:30 p.m.) Laura McKenzie's Traveler (8 p.m.), Aussie Wine Trail (8:30 p.m.), Forensic Factor (9 p.m.), Earth Wind & Fire / Chicago (10 p.m.)

HDNet (1080i): Sound Off with Matt Pinfield (7 p.m.), True Music w/ Katie Daryl (7:30 p.m.), Smallville (8 & 11 p.m.), Star Trek: Enterprise (9 p.m.), Joan of Arcadia (10 p.m.),

HDNet Movies (1080i): Gloria (6 p.m.), Thelma & Louise (8:05 p.m.), Klute (10:15 p.m.)

Universal HD (1080i): Medical Investigation (6 p.m.), The Equalizer (7 p.m.), Law & Order: SVU (8 p.m.), Brazil (9 p.m.), Control Factor (11:30 p.m.)

HBO-HD (1080i): Prime (6:15 p.m.), Comic Relief 2006 (8 p.m.)

Showtime-HD (1080i): Sleepless in Seattle (7:30 p.m.), National Lampoon presents Barely Legal (9 p.m.), Dexter (11 p.m.)

MAX-HD (1080i): Point of No Return (6 p.m.), Tristan & Isolde (8 p.m.), Star Wars Episode II: Attack of the Clones (10 p.m.)

STZ HD (1080i): Mindhunters (10:40 p.m.)

"His" and "hers" mice for the criminally insane