<page_title> John Karlen </page_title> <section_title> Television </section_title> <table> <cell> 1967–71 </cell> <cell> Dark Shadows </cell> <cell> Willie Loomis Carl Collins William H Loomis Desmond Collins Kendrick Young </cell> <cell> 182 episodes </cell> </table>
Karlen appeared in the television series Dark Shadows for 182 episodes, playing various characters through 1971.