Tags: Soap Character.
Heidi Costello (née Blissett) is a fictional character from the British Channel 4 soap opera Hollyoaks played by Kim Tiddy. She made her first on-screen appearance on 20 July 2010 and made her final appearance in the series on 1 November 2011 after the character was accidentally murdered by her father Silas Blissett in which he mistakes her for Lynsey Nolan.