Cohen and Master on Dirty Business Cohen & Master have been featured on several episodes of the television show Dirty Business. During their appearances CMtrees were required to remove an old and dangerous tree. The home redevelopers required that the old tree was to be removed before a new one was planted. As the tree was over 30cm diameter measured from 1.4 metres above ground level a permit was needed for removal as required by Toronto Tree By laws. Cohen and Master later appeared performing a tree trimming service to the home redevelopers so the house could receive more sun light during the winter. The size of the tree being trimmed required an Arborist to perform the trimming.