For these reasons, different sexes, ages, classes, religions and races were all included in the original character line-up. Both Holland and Smith had been at the forefront of the move towards 'integrated casting' in television and had encountered an array of ethnic diversities in the process.
The decision to include diverse groups was based on the reasons provided, leading to a character lineup that represented different sexes, age groups, social classes, religions, and races. Holland and Smith had been pioneers in 'inclusive casting' on television, having encountered various ethnicities and cultural differences during their careers.