diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 67a82fab..d18c0707 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1023,14 +1023,17 @@ def fetchcp_new(rower,workouts):
         cpfile = 'media/cpdata_{id}.parquet.gz'.format(id=workout.id)
         try:
             df = pd.read_parquet(cpfile)
+            df['workout'] = str(workout)
             data.append(df)
         except OSError:
             # CP data file doesn't exist yet. has to be created
-            data.append(setcp(workout)[0])
+            df, delta, cpvalues = setcp(workout)
+            df['workout'] = str(workout)
+            data.append(df)
 
 
     if len(data) == 0:
-        return pd.Series(),pd.Series(),0
+        return pd.Series(),pd.Series(),0,pd.Series()
     if len(data)>1:
         df = pd.concat(data,axis=0)
 
@@ -1039,7 +1042,7 @@ def fetchcp_new(rower,workouts):
 
     df = df.sort_values(['delta']).reset_index()
 
-    return df['delta'],df['cp'],0
+    return df['delta'],df['cp'],0,df['workout']
 
 def setcp(workout):
     strokesdf = getsmallrowdata_db(['power','workoutid','time'],ids = [workout.id])
@@ -1501,7 +1504,7 @@ def save_workout_database(f2, r, dosmooth=True, workouttype='rower',
                     workouttype__in=otwtypes,
                 )
 
-                dd,cpcp,avgpower = fetchcp_new(r,workouts)
+                dd,cpcp,avgpower,workoutnames = fetchcp_new(r,workouts)
 
                 powerdf = pd.DataFrame({
                     'Delta':dd,
@@ -1533,7 +1536,7 @@ def save_workout_database(f2, r, dosmooth=True, workouttype='rower',
                     date__gte=firstdate,
                     workouttype__in=otetypes,
                 )
-                dd,cpcp,avgpower = fetchcp_new(r,workouts)
+                dd,cpcp,avgpower,workoutnames = fetchcp_new(r,workouts)
                 powerdf = pd.DataFrame({
                     'Delta':dd,
                     'CP':cpcp,
diff --git a/rowers/interactiveplots.py b/rowers/interactiveplots.py
index 3f78a6f4..46fa5e78 100644
--- a/rowers/interactiveplots.py
+++ b/rowers/interactiveplots.py
@@ -2881,7 +2881,8 @@ def interactive_agegroupcpchart(age,normalized=False):
     return script,div
 
 
-def interactive_otwcpchart(powerdf,promember=0,rowername="",r=None,cpfit='data'):
+def interactive_otwcpchart(powerdf,promember=0,rowername="",r=None,cpfit='data',
+                           title=''):
     powerdf = powerdf[~(powerdf == 0).any(axis=1)]
     # plot tools
     if (promember==1):
@@ -2921,13 +2922,15 @@ def interactive_otwcpchart(powerdf,promember=0,rowername="",r=None,cpfit='data')
 
     deltas = fitt.apply(lambda x: timedeltaconv(x))
     ftime = niceformat(deltas)
+    workouts = powerdf['workout']
 
     sourcecomplex = ColumnDataSource(
         data = dict(
             CP = fitpower,
             CPmax = ratio*fitpower,
             duration = fitt,
-            ftime = ftime
+            ftime = ftime,
+            workout = workouts,
             )
         )
 
@@ -2970,7 +2973,9 @@ def interactive_otwcpchart(powerdf,promember=0,rowername="",r=None,cpfit='data')
     plot.y_range = Range1d(0,1.5*max(theavpower))
     plot.x_range = Range1d(1,2*max(thesecs))
     plot.legend.orientation = "vertical"
-    plot.title.text = "Critical Power for "+rowername
+    if not title:
+        title = "Critical Power for "+rowername
+    plot.title.text = title
 
     hover = plot.select(dict(type=HoverTool))
 
@@ -2978,6 +2983,7 @@ def interactive_otwcpchart(powerdf,promember=0,rowername="",r=None,cpfit='data')
         ('Duration ','@ftime'),
         ('Power (W)','@CP{int}'),
         ('Power (W) upper','@CPmax{int}'),
+        ('Workout','@workout'),
         ])
 
     hover.mode = 'mouse'
diff --git a/rowers/views/analysisviews.py b/rowers/views/analysisviews.py
index 891f548f..a450e83d 100644
--- a/rowers/views/analysisviews.py
+++ b/rowers/views/analysisviews.py
@@ -521,10 +521,11 @@ def cpdata(workouts, options):
 
 
     ids = [w.id for w in workouts]
-    delta, cpvalue, avgpower = dataprep.fetchcp_new(r,workouts)
+    delta, cpvalue, avgpower,workoutnames = dataprep.fetchcp_new(r,workouts)
     powerdf = pd.DataFrame({
         'Delta':delta,
         'CP':cpvalue,
+        'workout':workoutnames,
     })
 
 
@@ -539,8 +540,15 @@ def cpdata(workouts, options):
     rowername = r.user.first_name+" "+r.user.last_name
 
     if len(powerdf) !=0 :
+        datefirst = pd.Series(w.date for w in workouts).min()
+        datelast = pd.Series(w.date for w in workouts).max()
+        title = 'CP chart for {name}, from {d1} to {d2}'.format(
+            name = rowername,
+            d1 = datefirst,
+            d2 = datelast,
+        )
         res = interactive_otwcpchart(powerdf,promember=True,rowername=rowername,r=r,
-                                     cpfit=cpfit)
+                                     cpfit=cpfit,title=title)
         script = res[0]
         div = res[1]
         p1 = res[2]
@@ -2426,6 +2434,7 @@ def otwrankings_view(request,userid=0,
     powerdf = pd.DataFrame({
         'Delta':delta,
         'CP':cpvalue,
+        'workout':pd.Series(),
         })
 
     if powerdf.empty: