How to get a tvshow dbid ?

Hello, I would like to know how to get the dbid of a tvshow from an episodes view. I can recover without problem by going first through the tvshow view with $INFO[listitem.dbid] on tvshow level but if I use a playlist with episodes I cannot access this dbid. I hope I was clear enough because with Google translation it is not always easy !
Thank you in advance for your answers !