Showtime started out in 1995 as part of the basic package on the now-defunct Galaxy service, showing first-run films. It later became available as part of the Austar and Foxtel services when they were launched. At the same time its sister channel, Encore, launched, showing older, 'classic' movies. Encore was renamed Showtime Greats in 2004, with a move to more contemporary films. The Showtime channels are now also available on Optus Television.
In September 2007 it was announced that a new premium channel called Showcase will be launched on 1 December 2007 as part of the suite of Showtime channels.
Showcase screens movies (mainly independent, arthouse and documentry features) as well as a number of television series.
Despite the name being Showtime, for branding purposes it is usually spelled in all capitals to match the channel logo. Similarly, Showcase is usually spelled in all lower case.