diff --git a/src/General/Index.coffee b/src/General/Index.coffee
index d82131355..6653472ef 100644
--- a/src/General/Index.coffee
+++ b/src/General/Index.coffee
@@ -72,7 +72,6 @@ Index =
 
     $.addClass doc, 'index-loading'
     @root = $.el 'div', className: 'board'
-    Index.cb.rootClass()
     @pagelist = $.el 'div',
       className: 'pagelist'
       hidden: true
@@ -91,6 +90,8 @@ Index =
     $.on @pagelist, 'click', @cb.pageNav
     $.on @searchInput, 'input', @onSearchInput
     $.on $('#index-search-clear', @navLinks), 'click', @clearSearch
+    $.on $('#hidden-toggle a',    @navLinks), 'click', @cb.toggleHiddenThreads
+    @cb.toggleCatalogMode()
 
     @update()
     $.asap (-> $('.board', doc) or d.readyState isnt 'loading'), ->
@@ -174,10 +175,22 @@ Index =
     Index.buildIndex()
 
   cb:
-    rootClass: ->
-      (if Conf['Index Mode'] is 'catalog' then $.addClass else $.rmClass) Index.root, 'catalog-mode'
+    toggleCatalogMode: ->
+      if Conf['Index Mode'] is 'catalog'
+        $.addClass Index.root, 'catalog-mode'
+        $('#hidden-toggle', Index.navLinks).hidden = false
+      else
+        $.rmClass Index.root, 'catalog-mode'
+        $('#hidden-toggle', Index.navLinks).hidden = true
+    toggleHiddenThreads: ->
+      @textContent = if Index.showHiddenThreads = !Index.showHiddenThreads
+        'Hide'
+      else
+        'Show'
+      Index.sort()
+      Index.buildIndex()
     mode: ->
-      Index.cb.rootClass()
+      Index.cb.toggleCatalogMode()
       Index.togglePagelist()
       Index.buildIndex()
     sort: ->
@@ -431,7 +444,7 @@ Index =
   buildCatalogViews: ->
     threads = Index.sortedNodes
       .map((threadRoot) -> Get.threadFromRoot threadRoot)
-      .filter (thread) -> !thread.isHidden
+      .filter (thread) -> !thread.isHidden isnt Index.showHiddenThreads
     catalogThreads = []
     for thread in threads when !thread.catalogView
       catalogThreads.push new CatalogThread Build.catalogThread(thread), thread
diff --git a/src/General/html/Features/Index-navlinks.html b/src/General/html/Features/Index-navlinks.html
index 6979ed9e8..e1f921fe6 100644
--- a/src/General/html/Features/Index-navlinks.html
+++ b/src/General/html/Features/Index-navlinks.html
@@ -4,4 +4,4 @@
 <span class="brackets-wrap" id="index-last-refresh"><time title="Last index refresh">...</time></span> 
 <input type="search" id="index-search" class="field" placeholder="Search">
 <a id="index-search-clear" href="javascript:;" title="Clear search">×</a>
-<span id="hidden-label" hidden> &mdash; <span id="hidden-count"></span></span>
+<span id="hidden-label" hidden> &mdash; <span id="hidden-count"></span> <span id="hidden-toggle" hidden>[<a href="javascript:;">Show</a>]</span></span>