diff --git a/FMScraper/items.py b/FMScraper/items.py
index 1042730..87535f9 100644
--- a/FMScraper/items.py
+++ b/FMScraper/items.py
@@ -68,4 +68,5 @@ class episode_Item(scrapy.Item):
     url_page = scrapy.Field()
     date_diffusion = scrapy.Field()
     file_size= scrapy.Field()
+    file_last_modified = scrapy.Field()
 
diff --git a/FMScraper/pipelines.py b/FMScraper/pipelines.py
index e6caca2..7586878 100644
--- a/FMScraper/pipelines.py
+++ b/FMScraper/pipelines.py
@@ -9,6 +9,21 @@ import psycopg2
 from config_db import DATABASE as DB
 from FMScraper.items import show_Item, episode_Item
 
+def show_exists(self, url):
+    cur = self.connection.cursor()
+    cur.execute('SELECT id FROM emission WHERE url_page = %s',(url,))
+    return cur.fetchone()
+
+def episode_exists(self, id_site):
+    cur = self.connection.cursor()
+    cur.execute('SELECT id FROM episode WHERE id_episode_site = %s',(id_site,))
+    return cur.fetchone()
+
+def media_exists(self, date_modif, url_file):
+    cur = self.connection.cursor()
+    cur.execute('SELECT id FROM media WHERE date_modif = %s AND url_file = %s',(date_modif, url_file))
+    return cur.fetchone()
+
 class FmscraperPipeline(object):
     def open_spider(self, spider):
 
@@ -28,27 +43,23 @@ class FmscraperPipeline(object):
     def process_item(self, item, spider):
 
         if isinstance(item, show_Item):
-#            Ajouter l'émission à la table Emission
-#            Vérifier existence de l'émission via URL_page
-#            champs nom, urlpage, urlrss, genre, producteur
-            self.cur.execute("INSERT INTO emission (nom, url_page, url_rss) VALUES (%s, %s, %s) RETURNING id", (item['name'], item['url_page'], item['url_feed']))
-            self.emission_id = self.cur.fetchone()[0]
-#            self.connection.commit()
+            if show_exists(self, url=item['url_page']) is not None:
+                self.emission_id = show_exists(self, url=item['url_page'])[0]
+            else:
+                self.cur.execute("INSERT INTO emission (nom, url_page, url_rss) VALUES (%s, %s, %s) RETURNING id", (item['name'], item['url_page'], item['url_feed']))
+                self.emission_id = self.cur.fetchone()[0]
+                self.connection.commit()
 
         if isinstance(item, episode_Item):
-#            Vérifier l'existence de l'episode via ID_episode
-#            Ajouter l'épisode à la table Episode (avec l'émission associée en clé étrangère)
-            self.cur.execute("INSERT INTO episode (titre, description_lead, description_full, id_episode_site, emission_id) VALUES (%s, %s, %s, %s, %s) RETURNING id", (item['title'], item['description_lead'], item['description_full'], item['id_episode'], self.emission_id))
-            episode_id = self.cur.fetchone()[0]
-            self.connection.commit()
-
-#            Faire le lien episode -> emission via le nom de l'emission
-#            Récupérer l'ID de l'entrée emission généré
-
-#            Ajouter les infos de fichier dans la table Media
-            self.cur.execute("INSERT INTO media (url_file, filename_orig, size, episode_id) VALUES (%s, %s, %s, %s) RETURNING id", (item['url_file'], item['url_file'], item['file_size'], episode_id))
-            self.connection.commit()
-#            Vérifier l'existence du fichier via url et taille du fichier, passer si correspondance existante
+            if episode_exists(self, item['id_episode']) is not None:
+                self.episode_id = episode_exists(self, item['id_episode'])[0]
+            else:
+                self.cur.execute("INSERT INTO episode (titre, description_lead, description_full, id_episode_site, emission_id) VALUES (%s, %s, %s, %s, %s) RETURNING id", (item['title'], item['description_lead'], item['description_full'], item['id_episode'], self.emission_id))
+                self.episode_id = self.cur.fetchone()[0]
+                self.connection.commit()
 
+            if media_exists(self, item['file_last_modified'], item['url_file']) is None:
+                self.cur.execute("INSERT INTO media (url_file, filename_orig, size, date_modif, episode_id) VALUES (%s, %s, %s, %s, %s) RETURNING id", (item['url_file'], item['url_file'], item['file_size'], item['file_last_modified'], self.episode_id))
+                self.connection.commit()
 
         return item
diff --git a/FMScraper/spiders/get_episodes.py b/FMScraper/spiders/get_episodes.py
index e523ef8..c1d1912 100644
--- a/FMScraper/spiders/get_episodes.py
+++ b/FMScraper/spiders/get_episodes.py
@@ -56,6 +56,7 @@ class GetEpisodesSpider(scrapy.Spider):
                 if field == 'url_file':
                     file_info = urllib.request.urlopen(response.xpath(xpath).extract_first())
                     loader.add_value('file_size', file_info.headers['content-length'] )
+                    loader.add_value('file_last_modified', file_info.headers['last-modified'])
 
             loader.add_value('url_page', response.url)
             loader.add_value('url_emission', url_emission)
diff --git a/README.md b/README.md
index fba4cad..626db75 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@
          filename_orig text NOT NULL,
          filename_local text,
          size integer NOT NULL,
-         date_modif date NOT NULL,
+         date_modif timestamp,
       md5 text,
       duration real,
       episode_id INTEGER REFERENCES episode(id)