my %temp_hash;
while (my $ref = $sth->fetchrow_hashref) {
     my $season = $ref->{season};
     my $title = $ref->{title};
    push @{$temp_hash{$season}}, { title => $title };
}

##</code><code>##

my $appearances = [ map { +{ season => $_ , eps => $temp_hash{$_} } } 
                       sort keys %temp_hash ];