diff --git a/src/apps/epic/static/apps/epic/sig-select.js b/src/apps/epic/static/apps/epic/sig-select.js
index 94d222e..df81ca1 100644
--- a/src/apps/epic/static/apps/epic/sig-select.js
+++ b/src/apps/epic/static/apps/epic/sig-select.js
@@ -29,6 +29,10 @@ var SigSelect = (function () {
     var _reservedFloats  = {};   // key: role → portal <i> element (thumbs-up, frozen)
     var _cursorPortal = null;
 
+    // CAST SKY click → page reload. Reassignable via setReload for tests so
+    // they can spy without actually reloading the Jasmine runner.
+    var _reload = function () { window.location.reload(); };
+
     function getCsrf() {
         var m = document.cookie.match(/csrftoken=([^;]+)/);
         return m ? m[1] : '';
@@ -625,12 +629,16 @@ var SigSelect = (function () {
         userRole    = overlay.dataset.userRole;
         userPolarity= overlay.dataset.polarity;
 
-        // CAST SKY btn is rendered hidden during SIG_SELECT; reveal on pick_sky_available
+        // CAST SKY btn is rendered hidden during SIG_SELECT; revealed by
+        // room:pick_sky_available once both polarity rooms are done. Clicking
+        // it must reload the page — the _sky_overlay.html partial is only
+        // included server-side once room.table_status == "SKY_SELECT", so
+        // reloading is the only path that brings the modal + its openSky
+        // handler into the DOM. (Tray.placeSig already played during the
+        // polarity_room_done sequence; do NOT re-open the tray here.)
         var pickSkyBtn = document.getElementById('id_pick_sky_btn');
         if (pickSkyBtn) {
-            pickSkyBtn.addEventListener('click', function () {
-                if (typeof Tray !== 'undefined') Tray.open();
-            });
+            pickSkyBtn.addEventListener('click', function () { _reload(); });
         }
 
         // Restore reservations from server-rendered JSON (page-load state).
@@ -738,5 +746,6 @@ var SigSelect = (function () {
         },
         _setFrozen: function (v) { _stageFrozen = v; },
         _setReservedCardId: function (id) { _reservedCardId = id; },
+        setReload:  function (fn) { _reload = fn; },
     };
 }());
diff --git a/src/static/tests/SigSelectSpec.js b/src/static/tests/SigSelectSpec.js
index ccabfbb..330de47 100644
--- a/src/static/tests/SigSelectSpec.js
+++ b/src/static/tests/SigSelectSpec.js
@@ -894,4 +894,44 @@ describe("SigSelect", () => {
             expect(document.getElementById("id_hex_waiting_msg")).toBe(null);
         });
     });
+
+    // ── CAST SKY click (post pick_sky_available reveal) ──────────────────── //
+    //
+    // After room:pick_sky_available reveals the hidden #id_pick_sky_btn, a
+    // click on CAST SKY must reload the page — the _sky_overlay.html partial
+    // is only rendered server-side once room.table_status == "SKY_SELECT", so
+    // reloading is the only way to bring its modal + openSky handler into the
+    // DOM. The handler must NOT call Tray.open: the tray was already played
+    // during the polarity_room_done sequence (Tray.placeSig) and re-opening it
+    // here would swap Sky Select for the tray.
+
+    describe("CAST SKY click (post pick_sky_available)", () => {
+        let pickSkyBtn, reloadSpy;
+
+        beforeEach(() => {
+            pickSkyBtn = document.createElement("button");
+            pickSkyBtn.id = "id_pick_sky_btn";
+            pickSkyBtn.style.display = "none";
+            document.body.appendChild(pickSkyBtn);
+            makeFixture({ polarity: "levity", userRole: "PC" });
+            reloadSpy = jasmine.createSpy("reload");
+            SigSelect.setReload(reloadSpy);
+            spyOn(Tray, "open");
+        });
+
+        afterEach(() => {
+            if (pickSkyBtn) pickSkyBtn.remove();
+            SigSelect.setReload(function () { window.location.reload(); });
+        });
+
+        it("reloads the page so the sky overlay partial renders", () => {
+            pickSkyBtn.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+            expect(reloadSpy).toHaveBeenCalled();
+        });
+
+        it("does NOT call Tray.open (tray was already played by Tray.placeSig)", () => {
+            pickSkyBtn.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+            expect(Tray.open).not.toHaveBeenCalled();
+        });
+    });
 });
diff --git a/src/static_src/tests/SigSelectSpec.js b/src/static_src/tests/SigSelectSpec.js
index ccabfbb..330de47 100644
--- a/src/static_src/tests/SigSelectSpec.js
+++ b/src/static_src/tests/SigSelectSpec.js
@@ -894,4 +894,44 @@ describe("SigSelect", () => {
             expect(document.getElementById("id_hex_waiting_msg")).toBe(null);
         });
     });
+
+    // ── CAST SKY click (post pick_sky_available reveal) ──────────────────── //
+    //
+    // After room:pick_sky_available reveals the hidden #id_pick_sky_btn, a
+    // click on CAST SKY must reload the page — the _sky_overlay.html partial
+    // is only rendered server-side once room.table_status == "SKY_SELECT", so
+    // reloading is the only way to bring its modal + openSky handler into the
+    // DOM. The handler must NOT call Tray.open: the tray was already played
+    // during the polarity_room_done sequence (Tray.placeSig) and re-opening it
+    // here would swap Sky Select for the tray.
+
+    describe("CAST SKY click (post pick_sky_available)", () => {
+        let pickSkyBtn, reloadSpy;
+
+        beforeEach(() => {
+            pickSkyBtn = document.createElement("button");
+            pickSkyBtn.id = "id_pick_sky_btn";
+            pickSkyBtn.style.display = "none";
+            document.body.appendChild(pickSkyBtn);
+            makeFixture({ polarity: "levity", userRole: "PC" });
+            reloadSpy = jasmine.createSpy("reload");
+            SigSelect.setReload(reloadSpy);
+            spyOn(Tray, "open");
+        });
+
+        afterEach(() => {
+            if (pickSkyBtn) pickSkyBtn.remove();
+            SigSelect.setReload(function () { window.location.reload(); });
+        });
+
+        it("reloads the page so the sky overlay partial renders", () => {
+            pickSkyBtn.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+            expect(reloadSpy).toHaveBeenCalled();
+        });
+
+        it("does NOT call Tray.open (tray was already played by Tray.placeSig)", () => {
+            pickSkyBtn.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+            expect(Tray.open).not.toHaveBeenCalled();
+        });
+    });
 });