     @options = _.extend(@defaultOptions, @app.extensionOptions.ChapterMarks)
     return if @options.disabled
 
-    @chaptermarks = @app.episode.chaptermarks
-    return unless @chaptermarks && @chaptermarks.length
+    @chapters = @app.episode.chaptermarks
+    return unless @chapters && @chapters.length
 
     @renderPanel()
     @renderButton()

  renderPanel: =>
    @panel = $(@panelHtml)
    @panel.hide()
    marks = _.map(@chaptermarks, (item) =>
      new ChapterMark(item, @click)
    )
    marks = _.sortBy(marks, (mark) =>
      mark.data.startInSeconds
    )
    _.map(marks, (mark) =>
      @panel.find('ul').append(mark.render())
    )



  setActiveMark: () =>
    time = @app.player.currentTimeInSeconds
    if time <= Utils.hhmmssToSeconds(@chaptermarks[0].data.start)
      @deactivateAll()
      @activateMark(@chaptermarks[0])
    else
      _(@chaptermarks).findLast (mark) =>
        markTime = Utils.hhmmssToSeconds(mark.data.start)
        return unless time >= markTime

        @deactivateAll()
