diff --git a/atlas/templates/atlas/partials/truncate_result.html b/atlas/templates/atlas/partials/truncate_result.html
new file mode 100644
index 00000000..2b774c49
--- /dev/null
+++ b/atlas/templates/atlas/partials/truncate_result.html
@@ -0,0 +1,10 @@
+<div class="alert alert-success">
+    <strong>Truncate complete.</strong>
+    <div class="small mt-1">Removed {{ images_removed|length }} images from series {{ series.pk }}.</div>
+</div>
+{% if images_removed %}
+    <details class="mt-2">
+        <summary class="small">Show removed image IDs</summary>
+        <div class="small mt-1">{{ images_removed|join:", " }}</div>
+    </details>
+{% endif %}
diff --git a/atlas/templates/atlas/series_viewer.html b/atlas/templates/atlas/series_viewer.html
index 7a0d2c3e..92f071f5 100755
--- a/atlas/templates/atlas/series_viewer.html
+++ b/atlas/templates/atlas/series_viewer.html
@@ -251,8 +251,10 @@
                     return;
                 }
 
-                if(confirm(`Trucated series. This will leave ${upper_bound - lower_bound + 1} images.`) == true) {
-                    htmx.ajax("GET", `{% url 'api-1:series_truncate' series.id '****' '++++' %}`.replace("****", lower_bound).replace("++++", upper_bound), "#truncate-output")
+                    if(confirm(`Trucated series. This will leave ${upper_bound - lower_bound + 1} images.`) == true) {
+                    const truncateTemplate = `{% url 'atlas:series_truncate' series.id 0 0 %}`; // e.g. /atlas/series/920/truncate/0/0/
+                    const truncateUrl = truncateTemplate.replace('/0/0/', `/${lower_bound}/${upper_bound}/`);
+                    htmx.ajax("GET", truncateUrl, "#truncate-output")
 
                 }
 
diff --git a/atlas/urls.py b/atlas/urls.py
index 71142d2e..0ed24f9e 100755
--- a/atlas/urls.py
+++ b/atlas/urls.py
@@ -472,6 +472,11 @@ urlpatterns = [
     # TODO: case context series viewing (so that we can view series in the context of a case)
     path("series/<int:pk>", views.series_detail, name="series_detail"),
     path("series/<int:pk>/viewer", views.series_viewer, name="series_viewer"),
+        path(
+            "series/<int:series_id>/truncate/<int:start>/<int:end>/",
+            views.series_truncate_htmx,
+            name="series_truncate",
+        ),
     path("series/<int:pk>/images/", views.series_images_partial, name="series_images"),
     path("series/<int:pk>/authors", views.SeriesAuthorUpdate.as_view(), name="series_authors"),
     path("series/<int:series_id>/finding/related", views.series_finding_related, name="series_finding_related"),
diff --git a/atlas/views.py b/atlas/views.py
index c614efd1..02129413 100755
--- a/atlas/views.py
+++ b/atlas/views.py
@@ -196,6 +196,43 @@ from helpers.cimar import CimarAPI
 logger = logging.getLogger(__name__)
 
 
+@login_required
+def series_truncate_htmx(request, series_id, start, end):
+    """HTMX endpoint to truncate a series' images to the given inclusive
+    start/end bounds (zero-based). Returns an HTML fragment with the result.
+    """
+    series = get_object_or_404(Series, pk=series_id)
+
+    if not series.check_user_can_edit(request.user):
+        return HttpResponse("<div class=\"alert alert-danger\">Permission denied</div>")
+
+    images_removed = []
+    for n, image in enumerate(series.get_images()):
+        if n >= int(start) and n <= int(end):
+            # keep images within bounds
+            continue
+        else:
+            image.removed = True
+            image.image = None
+            image.save()
+            images_removed.append(image.pk)
+
+    # Recalculate stored series size
+    try:
+        series.get_total_image_size(refresh=True)
+    except Exception:
+        # ignore errors when recalculating
+        pass
+
+    # Render a simple message fragment for HTMX swap
+    html = render_to_string(
+        "atlas/partials/truncate_result.html",
+        {"images_removed": images_removed, "series": series},
+        request=request,
+    )
+    return HttpResponse(html)
+
+
 @login_required
 def case_search_partial(request):
     """Return an HTMX partial listing cases matching the query parameter `q`.