May Collins is only one of the 8 Barnhurst inmates but only 5 went to H block. Early career criminal who was a famous cat burglar. Lou Kelly thought that May was going to take over top dog from Myra. May is know as Aunty May by the inmates. Both May Collins and Willie Beecham are inside because May did the stealing and gave all the goodies to Willies father but when he died Willie took over and started selling the goodies in the same area that they were stolen from and got caught. They have been together in prison ever since. Usually bickering loudly with each other. Although getting on in years, May is a tough lady who watches out for the more vulnerable, younger prisoners. May took over as top dog while Myra was in Solitary (539). May was stabbed by one of the delinquents Cindy Moran with a skewer. After her "escape", she works with a gang to rob an art gallery and after much disagreement she is shot in her chest.

Billie Hammerberg appeared earlier in the series playing Valerie Richardson.