Tracklist front / back album covers
Side one
1. "Other Arms" 4:20
2. "In the Mood" 5:19
3. "Messin' with the Mekon" 4:40
4. "Wreckless Love" 5:18
Side two
5. "Thru' with the Two Step" 5:33
6. "Horizontal Departure" 4:19
7. "Stranger Here... Than Over There" 4:18
8. "Big Log" 5:03
Total length: 38:50
2007 remaster bonus tracks
9. "In the Mood" (Live) 7:35
10. "Thru' with the Two Step" (Live) 11:11
11. "Lively Up Yourself" (Live) 3:04
12. "Turnaround" 4:55
Live tracks: recorded in Houston, Texas in 1983
Robert Plant Band Members / Musicians
Robert Plant – lead vocals and backing vocals
Robbie Blunt – guitars
Gerald Woodroffe – synthesizers, Roland TR-808 on track 8
Paul Martinez – basses
Phil Collins – drums, except 4, 7, and 8 (incl. bonus tracks)
Barriemore Barlow – drums on tracks 4, 7
Roland TR-808 drum machine - 8
John David – backing vocals
Ray Martinez – backing vocals
The Principle of Moments is the second solo studio album by the English singer Robert Plant, formerly of Led Zeppelin. It was Plant's second Top 10 album in the US and UK. It also gave him his first solo Top 40 hit with "Big Log". The most popular track on album-oriented rock radio in the US was "Other Arms", which reached number-one on the Billboard Top Tracks chart. Genesis' drummer Phil Collins played drums for five of the album's eight songs (as he did on Pictures at Eleven). On the other two tracks former Jethro Tull drummer Barriemore Barlow performed. On the closing track "Big Log", Gerald Woodroffe programmed a Roland TR-808 drum machine.