diff --git a/atlas/forms.py b/atlas/forms.py
index 0f2a9c14..ac1222e5 100755
--- a/atlas/forms.py
+++ b/atlas/forms.py
@@ -58,6 +58,14 @@ class SeriesForm(ModelForm):
 
         ModelForm.__init__(self, *args, **kwargs)
 
+        case_queryset = Case.objects.all()
+
+        self.fields["long"] = ModelMultipleChoiceField(
+            required=False,
+            queryset=case_queryset,
+            widget=FilteredSelectMultiple(verbose_name="Long", is_stacked=False),
+        )
+
     class Meta:
         model = Series
         exclude = ["author"]