What hook gets called when I edit or publish a custom post type of name ‘episode gallery’ ?

I tried following but none worked.

add_action('save_post', 'update_custom_ngg_table');
add_action('update_postmeta', 'update_custom_ngg_table');
add_action('publish_post', 'update_custom_ngg_table');
add_action('edit_post', 'update_custom_ngg_table');
add_action('edit_page', 'update_custom_ngg_table');
add_action('publish_page', 'update_custom_ngg_table');
add_action('save_page', 'update_custom_ngg_table');
add_action('publish_episode-gallery', 'update_custom_ngg_table');

I am about to give up 🙂