Um, no. The show lost viewers in the original series between Colin Baker's first and second seasons, not because of Colin, but because of internal politics that saw the BBC publically attacking their own show. They were trying to get rid of it from that point on, and then set out to make certain the McCoy era would fail by dumping it in a graveyard slot against a show that was pulling in 20 million viewers per week and giving it sod all publicity (esp in his final season).
