diff --git a/classes/ComicPressTagBuilder.inc b/classes/ComicPressTagBuilder.inc
index 33e350d..92238fd 100644
--- a/classes/ComicPressTagBuilder.inc
+++ b/classes/ComicPressTagBuilder.inc
@@ -36,6 +36,7 @@ class ComicPressTagBuilder {
 
 	public function __call($method, $arguments) {
 		$ok = false;
+		$return = $this;
 
 		switch ($method) {
 			case 'next':
@@ -66,11 +67,11 @@ class ComicPressTagBuilder {
 			case 'post':
 				return $this->post;
 			default:
-				$methods = $this->parse_method($method);
+				$methods = $this->parse_method($method, $arguments);
 				if (!empty($methods)) {
 					foreach ($methods as $method_info) {
 						$new_method = array_shift($method_info);
-						call_user_func_array(array($this, $new_method), $method_info);
+						$return = call_user_func_array(array($return, $new_method), $method_info);
 					}
 					$ok = true;
 				}
@@ -78,7 +79,7 @@ class ComicPressTagBuilder {
 		}
 
 		if ($ok) {
-			return $this;
+			return $return;
 		} else {
 			throw new ComicPressException("${method} isn't allowed at this point");
 		}
@@ -88,7 +89,7 @@ class ComicPressTagBuilder {
 	const HAS_POST_METHOD = 'has post method';
 	const HAS_EXTRACT_METHOD = 'has extract method';
 
-	public function parse_method($method_name) {
+	public function parse_method($method_name, $extract_method_arguments = null) {
 		$methods = array();
 
 		$parts = explode('_', $method_name);
@@ -138,10 +139,17 @@ class ComicPressTagBuilder {
 			}
 		}
 
-		foreach (array('post', 'extract') as $prefix) {
-			if (!is_null(${"${prefix}_method"})) {
-				$methods[] = array(${"${prefix}_method"});
+		if (!is_null($post_method)) {
+			$methods[] = array($post_method);
+		}
+
+		if (!is_null($extract_method)) {
+			$extract_method = array($extract_method);
+			if (is_array($extract_method_arguments)) {
+				$extract_method = array_merge($extract_method, $extract_method_arguments);
 			}
+
+			$methods[] = $extract_method;
 		}
 
 		return $methods;
diff --git a/test/ComicPressTagBuilderTest.php b/test/ComicPressTagBuilderTest.php
index fd40758..eb199ff 100644
--- a/test/ComicPressTagBuilderTest.php
+++ b/test/ComicPressTagBuilderTest.php
@@ -91,6 +91,28 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 		}
 	}
 
+	private function setupStorylineBuilderTest($for_exceptions = false) {
+		$target_post = (object)array(
+			'ID' => 1,
+			'post_title' => 'Post title',
+			'post_date' => '2010-01-01',
+			'guid' => 'the-slug',
+		);
+
+		wp_insert_post($target_post);
+
+		$dbi = $this->getMock('ComicPressDBInterface', array('get_first_post'));
+		$expectation = $dbi->expects($this->any())->method('get_first_post');
+		if (!$for_exceptions) {
+			$expectation->with(array('1'))->will($this->returnValue($target_post));
+		}
+
+		$storyline = new ComicPressStoryline();
+		$storyline->set_flattened_storyline('0/1');
+
+		return compact('target_post', 'dbi', 'storyline');
+	}
+
 	function providerTestStorylineBuilderHandlePost() {
 		return array(
 			array('id', 1),
@@ -111,20 +133,7 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 	 * @dataProvider providerTestStorylineBuilderHandlePost
 	 */
 	function testStorylineBuilderHandlePost($info_method, $expected_result) {
-		$target_post = (object)array(
-			'ID' => 1,
-			'post_title' => 'Post title',
-			'post_date' => '2010-01-01',
-			'guid' => 'the-slug',
-		);
-
-		wp_insert_post($target_post);
-
-		$dbi = $this->getMock('ComicPressDBInterface', array('get_first_post'));
-		$dbi->expects($this->once())->method('get_first_post')->with(array('1'))->will($this->returnValue($target_post));
-
-		$storyline = new ComicPressStoryline();
-		$storyline->set_flattened_storyline('0/1');
+		extract($this->setupStorylineBuilderTest());
 
 		$core = new ComicPressTagBuilderFactory($dbi);
 		$core = $core->first_in_1();
@@ -150,20 +159,7 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 	 * @dataProvider providerTestStorylineBuilderExceptions
 	 */
 	function testStorylineBuilderExceptions($calls) {
-		$target_post = (object)array(
-			'ID' => 1,
-			'post_title' => 'Post title',
-			'post_date' => '2010-01-01',
-			'guid' => 'the-slug',
-		);
-
-		wp_insert_post($target_post);
-
-		$dbi = $this->getMock('ComicPressDBInterface', array('get_first_post'));
-		$dbi->expects($this->any())->method('get_first_post')->will($this->returnValue($target_post));
-
-		$storyline = new ComicPressStoryline();
-		$storyline->set_flattened_storyline('0/1');
+		extract($this->setupStorylineBuilderTest(true));
 
 		$core = new ComicPressTagBuilderFactory($dbi);
 
@@ -216,4 +212,12 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 	function testMethodParser($method_name, $expected_pieces) {
 		$this->assertEquals($expected_pieces, ComicPressTagBuilder::parse_method($method_name));
 	}
+
+	function testMethodParserWithParam() {
+		extract($this->setupStorylineBuilderTest());
+
+		$core = new ComicPressTagBuilderFactory($dbi);
+
+		$this->assertEquals('2010-01-01', $core->first_date_in_1('Y-m-d'));
+	}
 }