Chris Catalyst is a British rock guitarist, known for his work with the Sisters of Mercy, Ugly Kid Joe, Ginger Wildheart, Terrorvision, the Professionals, Mariachi El Bronx, the Scaramanga Six and his own band, Eureka Machines, as well as his more recent solo career.

[2] Despite collaborating with Andrew on the first new Sisters material in almost a decade, in 2019, frustrated with Eldritch's slow-paced work ethic, and becoming more busy and successful with his own projects, Catalyst stepped down from the band.

[3] Chris rejoined the band for their Autumn 2023 European tour, performing the duties of the Nurse (operator of the Doktor Avalanche drum machine).

Eureka Machines also released a double-disc DVD in 2015, featuring the band's set from the Brudenell Social Club in November 2014, as well as all of their promo videos and outtakes to date.

In January 2017, Catalyst released his debut solo album, Life Is Often Brilliant, upon which he performed all of the instruments apart from some piano and keys, which were provided by Willie Dowling and Bryan Scary.

[7] 2013 saw Catalyst, Ginger, Jon Poole, Rich Jones, Denzel, Victoria Liedtke and Brian Scary collaborate for the Albion album.

[citation needed] Later that year, Wildhearts guitarist CJ contracted COVID-19, leading the band to ask Catalyst to step in for him for a number of shows on their 21st Century Love Songs album tour.

[1] Catalyst has been playing the role of rhythm guitarist, Nameless Ghoul 'Aether' since 2017, with the band members previously hidden identities now public.

[11] Catalyst also played second drums and keyboards for Huddersfield band the Scaramanga Six from 2004 to 2009, recording the albums The Dance Of Death, Hot Flesh Rumble and Songs Of Prey with Tim Smith.