diff --git a/scenes/urls.py b/scenes/urls.py
index 8d14276..7824f98 100644
--- a/scenes/urls.py
+++ b/scenes/urls.py
@@ -9,5 +9,6 @@ urlpatterns = [
     path("projects/", views.projects),
     path("projects/<int:pk>/", views.project),
     path("projects/<int:pk>/scene/", views.scene),
+    path("projects/<int:pk>/script/", views.script),
     path("projects/<int:pk>/revisions/", views.revisions),
 ]
diff --git a/scenes/views.py b/scenes/views.py
index 09fbb15..1d758d5 100644
--- a/scenes/views.py
+++ b/scenes/views.py
@@ -174,6 +174,22 @@ def scene(request, pk):
     return HttpResponseNotAllowed(["GET", "PUT"])
 
 
+@csrf_exempt
+def script(request, pk):
+    """POST (owner/collaborator) — upload or replace the project's script PDF."""
+    if request.method != "POST":
+        return HttpResponseNotAllowed(["POST"])
+    if (resp := _auth(request)):
+        return resp
+    p = _editable(request, pk)
+    f = request.FILES.get("script")
+    if not f:
+        return JsonResponse({"detail": "script file is required"}, status=400)
+    p.script = f
+    p.save(update_fields=["script", "updated"])
+    return JsonResponse(_meta(request, p))
+
+
 def revisions(request, pk):
     """GET /api/projects/<pk>/revisions/ — the save history (who/when/what)."""
     if (resp := _auth(request)):
diff --git a/tl/src/tl/db.cljs b/tl/src/tl/db.cljs
index fbc9391..25d42fb 100644
--- a/tl/src/tl/db.cljs
+++ b/tl/src/tl/db.cljs
@@ -12,6 +12,7 @@
    :net-error nil                         ; backend unreachable (fetch-me / logout)
    :projects-error nil                    ; project-list fetch failure
    :save-error nil                        ; annotation save/delete failure
+   :script-error nil                      ; script PDF upload failure
    :fps   (/ 24000 1001)
 
    ;; the whole scene graph (see tl.scene). Seeded from OTIO at load.
diff --git a/tl/src/tl/events.cljs b/tl/src/tl/events.cljs
index 283b8b0..8fc7d7f 100644
--- a/tl/src/tl/events.cljs
+++ b/tl/src/tl/events.cljs
@@ -253,6 +253,22 @@
 
 (rf/reg-event-db ::set-pane (fn [db [_ p]] (assoc-in db [:view :pane] p)))
 
+;; upload (or replace) the project's script PDF; on success the refreshed detail
+;; carries the new script URL so the script pane renders it.
+(rf/reg-event-fx ::upload-script
+                 (fn [{:keys [db]} [_ file]]
+                   (let [id (get-in db [:project :id])
+                         fd (doto (js/FormData.) (.append "script" file))]
+                     {:db (assoc db :script-error nil)
+                      :http-xhrio (api/upload (str "/api/projects/" id "/script/") fd
+                                              {:on-success [::script-uploaded]
+                                               :on-failure [::script-upload-error]})})))
+(rf/reg-event-db ::script-uploaded
+                 (fn [db [_ detail]] (assoc db :project detail :script-error nil)))
+(rf/reg-event-db ::script-upload-error
+                 (fn [db [_ failure]]
+                   (assoc db :script-error (api/error-message failure "Script upload failed."))))
+
 ;; Script highlighting is an edit-mode sub-task: "Add script annotation" arms it
 ;; for the annotation being edited (the draft) and jumps to the Script tab; the
 ;; rects land on the draft's :script and ride its save. ✓ keeps, ✕ restores the
diff --git a/tl/src/tl/subs.cljs b/tl/src/tl/subs.cljs
index ba481e2..7ae9a1a 100644
--- a/tl/src/tl/subs.cljs
+++ b/tl/src/tl/subs.cljs
@@ -23,6 +23,7 @@
 (rf/reg-sub ::net-error    (fn [db] (:net-error db)))
 (rf/reg-sub ::projects-error (fn [db] (:projects-error db)))
 (rf/reg-sub ::save-error   (fn [db] (:save-error db)))
+(rf/reg-sub ::script-error (fn [db] (:script-error db)))
 (rf/reg-sub ::load-error   (fn [db] (get-in db [:load :error])))
 (rf/reg-sub ::authed?      (fn [db] (boolean (get-in db [:auth :authenticated]))))
 (rf/reg-sub ::username     (fn [db] (get-in db [:auth :username])))
diff --git a/tl/src/tl/views.cljs b/tl/src/tl/views.cljs
index 94b8af5..889eb1a 100644
--- a/tl/src/tl/views.cljs
+++ b/tl/src/tl/views.cljs
@@ -851,6 +851,8 @@
             anns   @(rf/subscribe [::subs/annotations])
             hl     @(rf/subscribe [::subs/highlighting])
             active @(rf/subscribe [::subs/active-annotation])
+            authed? @(rf/subscribe [::subs/authed?])
+            script-err @(rf/subscribe [::subs/script-error])
             armed  (:gid hl)
             hl-name (some #(when (= (:id %) armed) (:name %)) anns)]
         (when (and url (exists? js/pdfjsLib) (not= url @loaded))
@@ -877,8 +879,15 @@
              [:button.hl-ok {:title "Done" :on-click #(rf/dispatch [::events/finish-highlighting])} "✓"]
              [:button.hl-cancel {:title "Cancel" :on-click #(rf/dispatch [::events/cancel-highlighting])} "✕"]]]
            [:div.script-hint
-            (if url "Playing follows the script to each note. Edit an annotation → “Add script annotation” to link a passage."
-                "No script uploaded for this project.")])
+            (cond
+              url "Playing follows the script to each note. Edit an annotation → “Add script annotation” to link a passage."
+              authed? [:span.script-upload
+                       [:label.file-row "Upload a script (PDF) "
+                        [:input {:type "file" :accept ".pdf,application/pdf"
+                                 :on-change #(when-let [f (-> % .-target .-files (aget 0))]
+                                               (rf/dispatch [::events/upload-script f]))}]]
+                       (when script-err [:span.err " " script-err])]
+              :else "No script uploaded for this project.")])
          [:div.script-pages {:ref #(reset! el %)}
           (if (seq @pages)
             (doall (for [[n {:keys [pg w h]}] @pages]