diff --git a/src/lib/series.ts b/src/lib/series.ts
index b8ebc55..5d0691d 100644
--- a/src/lib/series.ts
+++ b/src/lib/series.ts
@@ -394,7 +394,7 @@ export interface ISeries<IndexT = number, ValueT = any> extends Iterable<ValueT>
     * const values = series.toArray();
     * </pre>
     */
-   toArray (): ValueT[];
+   toArray (options?: { includeNulls?: boolean }): ValueT[];
 
     /**
      * Retreive the index, values pairs from the series as an array.
@@ -2913,10 +2913,12 @@ export class Series<IndexT = number, ValueT = any> implements ISeries<IndexT, Va
     * const values = series.toArray();
     * </pre>
     */
-   toArray (): any[] {
+   toArray (options?: { includeNulls?: boolean }): any[] {
         const values = [];
         for (const value of this.getContent().values) {
-            if (value !== undefined && value !== null) {
+            if (options && options.includeNulls && value !== undefined) {
+                values.push(value);
+            } else if (value !== undefined && value !== null) {
                 values.push(value);
             }
         }
@@ -6691,4 +6693,4 @@ class OrderedSeries<IndexT = number, ValueT = any, SortT = any>
             parent: this
         });
     }
-}
+}
\ No newline at end of file
diff --git a/src/test/series.test.ts b/src/test/series.test.ts
index f5067a9..a8b0f9d 100644
--- a/src/test/series.test.ts
+++ b/src/test/series.test.ts
@@ -83,6 +83,29 @@ describe('Series', () => {
         expect(series.toArray()).to.eql([10, 20]);
     });
 
+	it('Series.toArray({includeNulls: true}) does not strip null values', () => {
+
+		var series = new Series([10, null, 20, null]);
+		expect(series.toArray({ includeNulls: true })).to.eql([10, null, 20, null]);
+	});
+
+	it('Series.toArray({includeNulls: true}) strips undefined values', () => {
+
+		var series = new Series([10, undefined, 20, undefined]);
+		expect(series.toArray({ includeNulls: true })).to.eql([10, 20]);
+	});
+
+	it('Series.toArray({includeNulls: false}) strips null values', () => {
+
+		var series = new Series([10, null, 20, null]);
+		expect(series.toArray({ includeNulls: false })).to.eql([10, 20]);
+	});
+
+	it('Series.toArray({includeNulls: false}) strips undefined values', () => {
+
+		var series = new Series([10, undefined, 20, undefined]);
+		expect(series.toArray({ includeNulls: false })).to.eql([10, 20]);
+	});
 
     it('Series.toPairs strips undefined values', () => {