Bain moved to Celtic earlier this year after being forced out of Dens Park.
Celtic will be hoping to get back on track when they face their Scottish Premiership rivals in the League Cup on Wednesday.
Scott Bain has not made a single Scottish Premiership appearance this season with Craig Gordon still Celtic's number one goalkeeper.
Scottish Premiership champions Celtic have signed four players this summer, Scott Bain, Odsonne Edouard, Daniel Arzani and Emilio Izaguirre.
Celtic are reportedly keen on Hibernian ace John McGinn.
Several Celtic fans have urged Brendan Rodgers to not use Craig Gordon as the Hoops' number one next season.
Dorus de Vries should consider his future at Brendan Rodgers’s Celtic.
Celtic completed the defence of their domestic treble with a 2-0 Scottish Cup final win over Motherwell on Saturday.
Celtic have received a Scottish Cup boost with Craig Gordon fit.
Celtic have made Scott Bain's loan move permanent, and the goalie admits the Rangers clash played a huge role.