diff --git a/caravel/assets/visualizations/directed_force.js b/caravel/assets/visualizations/directed_force.js
index 3aa63b5910..b4f792d37d 100644
--- a/caravel/assets/visualizations/directed_force.js
+++ b/caravel/assets/visualizations/directed_force.js
@@ -11,13 +11,13 @@ function directedForceVis(slice) {
     const width = slice.width();
     const height = slice.height() - 25;
     d3.json(slice.jsonEndpoint(), function (error, json) {
-      const linkLength = json.form_data.link_length || 200;
-      const charge = json.form_data.charge || -500;
-
       if (error !== null) {
         slice.error(error.responseText, error);
         return;
       }
+      const linkLength = json.form_data.link_length || 200;
+      const charge = json.form_data.charge || -500;
+
       const links = json.data;
       const nodes = {};
       // Compute the distinct nodes from the links.
@@ -87,6 +87,7 @@ function directedForceVis(slice) {
       .on('tick', tick)
       .start();
 
+      div.selectAll('*').remove();
       const svg = div.append('svg')
       .attr('width', width)
       .attr('height', height);
@@ -169,7 +170,6 @@ function directedForceVis(slice) {
         return d.name;
       });
 
-
       slice.done(json);
     });
   };
diff --git a/caravel/assets/visualizations/heatmap.js b/caravel/assets/visualizations/heatmap.js
index c0750ba56a..2cd4df237b 100644
--- a/caravel/assets/visualizations/heatmap.js
+++ b/caravel/assets/visualizations/heatmap.js
@@ -18,6 +18,10 @@ function heatmapVis(slice) {
     };
 
     d3.json(slice.jsonEndpoint(), function (error, payload) {
+      if (error) {
+        slice.error(error.responseText, error);
+        return;
+      }
       const data = payload.data;
       // Dynamically adjusts  based on max x / y category lengths
       function adjustMargins() {
@@ -56,10 +60,6 @@ function heatmapVis(slice) {
 
       slice.container.html('');
       const matrix = {};
-      if (error) {
-        slice.error(error.responseText, error);
-        return;
-      }
       const fd = payload.form_data;
 
       adjustMargins();
diff --git a/caravel/data/__init__.py b/caravel/data/__init__.py
index 5198a12af7..92ca10284e 100644
--- a/caravel/data/__init__.py
+++ b/caravel/data/__init__.py
@@ -326,7 +326,7 @@ def load_world_bank_health_n_pop():
                 defaults,
                 since="1960-01-01",
                 until="now",
-                whisker_options="Tukey",
+                whisker_options="Min/max (no outliers)",
                 viz_type='box_plot',
                 groupby=["region"],)),
         Slice(
diff --git a/caravel/utils.py b/caravel/utils.py
index 670c0694e0..3c298c780f 100644
--- a/caravel/utils.py
+++ b/caravel/utils.py
@@ -107,6 +107,7 @@ def get_or_create_main_db(caravel):
     logging.info(config.get("SQLALCHEMY_DATABASE_URI"))
     dbobj.set_sqlalchemy_uri(config.get("SQLALCHEMY_DATABASE_URI"))
     dbobj.expose_in_sqllab = True
+    dbobj.allow_run_sync = True
     db.session.add(dbobj)
     db.session.commit()
     return dbobj
diff --git a/caravel/views.py b/caravel/views.py
index 415a03571c..95ef578dc7 100755
--- a/caravel/views.py
+++ b/caravel/views.py
@@ -1599,9 +1599,7 @@ class Caravel(BaseCaravelView):
         viz_type = data.get('chartType')
         table = db.session.query(models.SqlaTable).filter_by(table_name=table_name).first()
         if not table:
-            table = models.SqlaTable(
-                table_name=table_name,
-            )
+            table = models.SqlaTable(table_name=table_name)
         table.database_id = data.get('dbId')
         table.sql = data.get('sql')
         db.session.add(table)
diff --git a/caravel/viz.py b/caravel/viz.py
index b68b1ebdd2..524a462acf 100755
--- a/caravel/viz.py
+++ b/caravel/viz.py
@@ -116,6 +116,8 @@ class BaseViz(object):
             del d['json']
         if 'action' in d:
             del d['action']
+        if 'slice_id' in d:
+            del d['slice_id']
         d.update(kwargs)
         # Remove unchecked checkboxes because HTML is weird like that
         od = MultiDict()
@@ -716,7 +718,7 @@ class BoxPlotViz(NVD3Viz):
     viz_type = "box_plot"
     verbose_name = _("Box Plot")
     sort_series = False
-    is_timeseries = False
+    is_timeseries = True
     fieldsets = ({
         'label': None,
         'fields': (