AutoMapper how to flatten nested lists - automapper

Question

I am trying to map out some nested lists into a list of flattened structures using automapper.
Currently I am able to map the correct number of credits with names but I can not get the role and role description to map across.
I am trying to get a flattened list like this.
John Smith, Actor, Dr Evil
John Smith, Writer, null
Frank Brown, Director, null
Joe Green, Actor, Henchman
Here is a cutdown version of my domain model, view model and mapping.
What am I doing wrong with the Domain.Credit to ViewModel.Credit mapping?
//Domain Model
public class Talent
{
public virtual string FirstName { get; set; }
public virtual string LastName { get; set; }
public virtual IList<Credit> Credits { get; set; }
}
public class Credit
{
public virtual Role Role { get; set; }
public virtual string Subtitle { get; set; }
}
public class Role
{
public virtual string Title { get; set; }
}
//View Model
public class EpisodeViewModel
{
public IList<Credit> Credits { get; set; }
public class Credit
{
public string Name { get; set; }
public string Role { get; set; }
public string RoleDescription { get; set; }
}
}
//Mappings
Mapper.CreateMap<Episode, EpisodeViewModel>()
.ForMember(destination => destination.Credits, options => options.MapFrom(source => source.Talent));
Mapper.CreateMap<Talent, Credit>()
.ForMember(destination => destination.Name, options => options.MapFrom(source => string.Format("{0} {1}", source.FirstName, source.LastName)));
Mapper.CreateMap<Domain.Credit, Credit>()
.ForMember(destination => destination.Role, options => options.MapFrom(source => source.Role.Title))
.ForMember(destination => destination.RoleDescription, options => options.MapFrom(source => source.Subtitle));