Rock-and-roll musicians may not dominate the music business like they used to, but they sure keep filmmakers busy. Martin Scorsese made a film about The Band, and Bob Dylan is shooting one on The Rolling Stones. Just this week, Sundance aired a four-hour epic on Tom Petty, and tonight “Amazing Journey: The Story of The Who” (8 p.m. today, VH1 and VH1 Classic) recalls the four-decade history of The Who.

This authorized film features interviews with surviving members Peter Townshend and Roger Daltrey, and plenty of archival chats with the late John Entwistle and Keith Moon.

The Who’s long history provides plenty of footage and fodder. Their trajectory from a British R&B cover band to releasing their own eccentric tunes (“Magic Bus”) to the epic rock opera “Tommy” reflects rock from its scruffiest to its most bombastic.

“Amazing Journey” features interviews with fellow musicians and fans, including Sting, U2’s The Edge, Pearl Jam’s Eddie Vedder and Oasis’ Noel Gallagher. It also showcases previously unreleased concert footage from such seminal gatherings as Monterey, Woodstock, The Isle of Wight 1970 and Live at Leeds. The film will be presented without commercials.

¢ NBC News anchor Brian Williams tries his hand at comedy when he hosts “Saturday Night Live” (10:30 p.m. today, NBC), featuring musical guest Feist. Not a complete stranger to comedy, the buttoned-down anchor has appeared often on “The Daily Show” and has been the subject of jokes on “30 Rock.”

¢ Stewie, the evil baby, finally murders his mother on the 100th episode of “Family Guy” (8 p.m. Sunday, Fox). I didn’t laugh at the vulgar shock-value gags on the first 99 “Guys” (featured in a retrospective at 7:30 p.m.) so don’t ask me to find it funny now.

In this episode, Peter defecates in public and tells a crude story about his wife’s trip to an abortion clinic. There are also stupendously obvious and scattershot asides about Barbra Streisand and Rosie O’Donnell. To call the humor on “Family Guy” mean-spirited is to give it credit for having any meaning at all. Fox canceled this series once, and I hope they do so again.

¢ “The Simpsons” (7 p.m. Sunday, Fox) celebrates Halloween with “Treehouse of Horror XVIII.” In addition to parodies of “ET” and “Mr. and Mrs. Smith,” the trilogy includes a story about Ned Flanders building a “Heck House,” a counter-Halloween scare-fest designed to introduce children to the terrors of the Seven Deadly Sins.

¢ The documentary “Living with Tigers” (7 p.m. Sunday, Animal Planet) kicks off “Tiger Week,” five nights of programming dedicated to the big cats.

Saturday’s highlights

¢ Eugene finds his own death difficult to fathom on “Torchwood” (8 p.m., BBC America).

¢ “Mad TV” (10 p.m., Fox) enters its 13th season. Carlos Mencia hosts the season opener.

Sunday’s highlights

¢ Scheduled on “60 Minutes” (6 p.m., CBS): profiles of the Iranian defector named “Curveball” who provided bogus evidence of weapons of mass destruction that was used to justify the 2003 invasion of Iraq; a Silicon Valley tycoon who blew the whistle on his former firm.

¢ A missing-persons case linked to Orson Welles’ 1938 “War of the Worlds” hoax broadcast resurfaces on “Cold Case” (8 p.m., CBS).

¢ The NFL’s Colts host the Patriots in a matchup of undefeated teams (3 p.m., CBS).

¢ Revelations galore at a pumpkin-themed party on “Desperate Housewives” (8 p.m., ABC).

¢ Larry tries to manipulate Cheryl’s therapy to his advantage on “Curb Your Enthusiasm” (9 p.m., HBO).