Prog 125 features Tarkus by Emerson, Lake & Palmer on the front cover with an article on the 50th anniversary of the band's classic album.

This issue also contains features on Carl Palmer, Rush, Caravan, Stephen W Tayler, Michał Łapaj, and more.

The covermount CD includes Mariana Semkina (iamthemorning) and Robert Reed.

This issue comes with a 2022 calendar featuring the art of Hugh Syme (Rush, Dream Theater etc).