Cassy hosted a guest show on 12 May 2023. Cassy has been played on NTS over 20 times, featured on 27 episodes and was first played on 16 January 2013.

Cassy (real name: Catherine Britton) left England for Austria in 1975 with her father. Her first musical foray was as a vocalist for Elin (aka Autorepeat) on "Music Takes Me Higher". It wasn't long before she turned her attention to mixing. She was often found in the Vienna and Munich scenes, before moving to Berlin in 2003. Shortly after she got involved with artists like Ricardo Villalobos and Steve Bug. Her first solo release was "My Auntie" on Perlon records