Copious trick-or-treaters descended upon Mercer Island Town Center on the evening of Oct. 27 to celebrate Hallo-Weekend. Pictured here are pirates Brodie and Cora Bonnema. Andy Nystrom/ staff photo

Kian Campbell enjoys his time with a shark. Andy Nystrom/ staff photo

Dog Olive gets in the Halloween spirit. Andy Nystrom/ staff photo

Kase and Aiden Lu stop along their route. Andy Nystrom/ staff photo

Eric Haines, the One Man Band, entertains the crowd. Andy Nystrom/ staff photo