Index: watcher.module
===================================================================
--- watcher.module	(revision 71)
+++ watcher.module	(revision 73)
@@ -503,6 +503,13 @@
 }
 
 /**
+ * Implementation of hook_nodeapi(), op: delete
+ */
+function _watcher_hook_nodeapi_delete(&$node, $a3, $a4) {
+  _watcher_db_delete_nid($node->nid);
+}
+
+/**
  * Implementation of hook_comment()
  */
 function watcher_comment($comment, $op) {
Index: watcher.db.inc
===================================================================
--- watcher.db.inc	(revision 71)
+++ watcher.db.inc	(revision 73)
@@ -228,6 +228,16 @@
 }
 
 /**
+ * Delete a node from the watch list
+ * @param <int> $nid node to delete
+ * @return
+ *    Boolean of success or failure
+ */
+function _watcher_db_delete_nid($nid) {
+  return db_query('DELETE FROM {watcher_nodes} WHERE nid=%d', $nid);
+}
+
+/**
  * Remove all NIDs on UID's watch list
  * @param $uid
  *     UID - a user id.