Released on Oct. 3, 1983 as part of their self-titled album, this represents one of the last rickety bridges between Genesis’ two eras.

Believed to be Yes’ first anti-war song, “Yours is No Disgrace” features some of Jon Anderson’s most visual, yet compact lyrics.

Savatage’s classic ‘Hall of the Mountain King,’ released on Sept. 28, 1987, was an eye-opening experience for first-time producer Paul O’Neill.

‘In the Hot Seat,’ released on Sept. 27, 1994, is apparently the final LP by Emerson Lake and Palmer. Carl Palmer explains why he’s OK with that.

Released this week in 1981, ‘Discipline’ found a retooled King Crimson stirring new wave elements into their essential prog sound.

‘The Incident,’ released this week in 2009, helped establish Porcupine Tree as a melodically inclined, less wank-inclined progressive rock band.

This Yes ballad has displayed a striking durability since becoming the unlikely but quite effective closer on 1970’s ‘Time and a Word.’

Pink Floyd’s ‘Wish You Were Here’ arrived on Sept. 12, 1975 after a lengthy, very difficult period of creative inertia, Nick Mason says.

Steve Howe and Chris Squire talked to us about Yes’ ‘Magnification.’ Released on Sept. 11, 2001, it would be their final album with Jon Anderson.

Even in an era when envelopes were often pushed, Pink Floyd’s “Alan’s Psychedelic Breakfast” proved to be utterly outrageous.