     currentFrame = +document.getElementById('frame-slider').value
     if @playTimeout? then @stopPlayingFrames() else @startPlayingFrames(currentFrame)
     @togglePausePlayIcons()
-    @subjectUnseen()
 
   startPlayingFrames: (startingFrame) ->
     startingFrame %= @surfacesContainer.find(".marking-surface:has(.frame-image)").length

    # hide all marks
    mark.setAttribute 'visibility', 'hidden' for mark in [@el.find(".mark")...]

  subjectUnseen: ->
    console.log 'SUBJECT: ', Subject.current
    return false

  showSummary: ->
    @appendMetadata()
    @knownAsteroidMessage.hide()

    if @subjectUnseen()
      @unseenSubjectMessage.show()

    # reset summary text
    @el.find("#known-asteroid-message").html "This subject contains at least one known asteroid (circled in green)."

    @el.find(".asteroid-visible-#{frameNum}").hide()
    @el.find("#marked-status-#{frameNum}").show().html("Marked!")

  updateIconsForDestroyMark: (frameNum) =>
    @el.find("#number-#{frameNum}").show()
    @el.find(".asteroid-frame-complete-#{frameNum}").prop 'checked', false
