Tonight (April 28) D’Oh Canada episode of the Simpsons airs on Citytv, and is available to stream Monday (April 29).  The premise of the Canadian themed show is, Lisa is making a break for Canada as the family takes a trip to Niagara Falls. She has an accident and ends up enjoying free health care and then seeks asylum.  The Simpsons D’Oh Canada will air at 8 o’clock on Citytv.  The Simpsons have mentioned Canada many times over the years take a look …