You know the silly summer-movie season is in full swing when the 2004 MTV Movie Awards (8 p.m., MTV) look back at last year’s already forgotten popcorn epics. Hey, I’ve already begun to forget this year’s summer movies. Just what was that Olsen twins comedy called?

You have to give the MTV movie awards credit for knowing that they carry absolutely no weight. Why else give a gilded bucket of popcorn to every winner? Just how pointless is this show? It’s already over! It was taped last Saturday, and the results will have been announced by the time you read this. In MTV-speak, it’s just so five days ago.

I won’t give too much away here. OK, the MTV choice for best picture did win a boatload of Oscars, too. We’re really supposed to watch these anything-but-live festivities for their perfectly scripted “spontaneous” moments allowing stars to pump their yet-to-released (and certain-to-be-forgotten) summer movies. There’s also a chance to watch host Lindsay Lohan, the teen of the nanosecond.

• Turner Classic Movies commemorates the passing of former president Ronald Reagan with a daylong marathon of his movies, beginning with the 1937 drama “Love is On the Air” (7 a.m.). In this, his first starring role, Reagan plays a headstrong radio personality. Before coming to Hollywood, Reagan had been a radio sportscaster who could “describe” entire baseball games based on telegraphed transcripts of the box score.

The gritty 1942 potboiler “Kings Row” (7 p.m.) is thought to contain Reagan’s best film performance. Reagan thought so, too, and even named one of his memoirs “Where’s the Rest of Me” after a line from this movie. Tonight’s other Reagan films include “Desperate Journey” (9:15 p.m.) and “The Last Outpost” (11:15 p.m.).

Missing from this collection are “Knute Rockne All American,” in which Reagan plays the doomed football star who inspires Pat O’Brien’s impassioned plea “to win just one for the Gipper.” Another notable omission is “Dark Victory,” a great Bette Davis weepy in which Reagan portrays a careless playboy. This collection also lacks “Hellcats of the Navy,” co-starring Reagan’s off-screen leading lady Nancy Davis.

Ronald Reagan will be Turner Classic Movies’ featured star of the month in October. Perhaps some of these missing movies will air then.

Tonight’s other highlights

• Alanis Morissette, Maroon 5, Joss Stone, Blink 182 and Morrissey perform on “Pepsi Smash” (7 p.m., WB).
• A sensitive soul (Kathleen Quinlan) attracts a kindred spirit while playing Cyrano for her brash daughter in the 2004 television film “Perfect Romance” (8 p.m., Lifetime).