Added a whole bunch of view teardown.

app/views/play/level/thang_avatar_view.coffee

@@ -56,3 +56,6 @@ module.exports = class ThangAvatarView extends View
 
   onNewWorld: (e) ->
     @options.thang = @thang = e.world.thangMap[@thang.id] if @thang
+
+  destroy: ->
+    super()

app/views/play/level/tome/spell_list_entry_thangs_view.coffee

@@ -11,6 +11,7 @@ module.exports = class SpellListEntryThangsView extends View
     @thangs = options.thangs
     @thang = options.thang
     @spell = options.spell
+    @avatars = []
 
   getRenderData: (context={}) =>
     context = super context
@@ -20,13 +21,19 @@ module.exports = class SpellListEntryThangsView extends View
 
   afterRender: ->
     super()
+    avatar.destroy() for avatar in @avatars if @avatars
     @avatars = []
     spellName = @spell.name
     for thang in @thangs
-      avatar = new ThangAvatarView thang: thang, includeName: true, supermodel: @supermodel
+      avatar = new ThangAvatarView thang: thang, includeName: true, supermodel: @supermodel, creator: @
       @$el.append avatar.el
       avatar.render()
       avatar.setSelected thang is @thang
       avatar.$el.data('thang-id', thang.id).click (e) ->
         Backbone.Mediator.publish "level-select-sprite", thangID: $(@).data('thang-id'), spellName: spellName
       avatar.onProblemsUpdated spell: @spell
+      @avatars.push avatar
+      
+  destroy: ->
+    avatar.destroy() for avatar in @avatars
+    super()

app/views/play/level/tome/spell_list_entry_view.coffee

@@ -46,6 +46,7 @@ module.exports = class SpellListEntryView extends View
     super()
     return unless @options.showTopDivider  # Don't repeat Thang avatars when not changed from previous entry
     return unless spellThang = @getPrimarySpellThang()
+    @avatar?.destroy()
     @avatar = new ThangAvatarView thang: spellThang.thang, includeName: false, supermodel: @supermodel
     @$el.prepend @avatar.el  # Before rendering, so render can use parent for popover
     @avatar.render()
@@ -100,3 +101,7 @@ module.exports = class SpellListEntryView extends View
 
   onNewWorld: (e) ->
     @lastSelectedThang = e.world.thangMap[@lastSelectedThang.id] if @lastSelectedThang
+    
+  destroy: ->
+    super()
+    @avatar?.destroy()

app/views/play/level/tome/spell_list_tab_entry_view.coffee

@@ -87,3 +87,7 @@ module.exports = class SpellListTabEntryView extends SpellListEntryView
     return if enabled is @controlsEnabled
     @controlsEnabled = enabled
     @$el.toggleClass 'read-only', not enabled
+
+  destroy: ->
+    @avatar?.destroy()
+    super()

app/views/play/level/tome/spell_list_view.coffee

@@ -19,6 +19,7 @@ module.exports = class SpellListView extends View
 
   constructor: (options) ->
     super options
+    @entries = []
     @sortSpells()
 
   sortSpells: ->
@@ -53,7 +54,6 @@ module.exports = class SpellListView extends View
     @addSpellListEntries()
 
   addSpellListEntries: ->
-    @entries ?= []
     newEntries = []
     lastThangs = null
     for spell, index in @spells
@@ -87,3 +87,7 @@ module.exports = class SpellListView extends View
     @spells = @options.spells = spells
     @sortSpells()
     @addSpellListEntries()
+
+  destroy: ->
+    super()
+    entry.destroy() for entry in @entries

app/views/play/level/tome/thang_list_entry_view.coffee

@@ -42,6 +42,7 @@ module.exports = class ThangListEntryView extends View
 
   afterRender: ->
     super()
+    @avatar?.destroy()
     @avatar = new ThangAvatarView thang: @thang, includeName: true, supermodel: @supermodel
     @$el.append @avatar.el  # Before rendering, so render can use parent for popover
     @avatar.render()
@@ -137,4 +138,4 @@ module.exports = class ThangListEntryView extends View
 
   destroy: ->
     super()
-    @avatar.destroy()
+    @avatar?.destroy()

app/views/play/level/tome/thang_list_view.coffee

@@ -80,3 +80,8 @@ module.exports = class ThangListView extends View
     @thangs = @options.thangs = thangs
     @sortThangs()
     @addThangListEntries()
+
+  destroy: ->
+    super()
+    entry.destroy() for entry in @entries
+