diff --git a/core/modules/filters/inspect.js b/core/modules/filters/inspect.js
index 7e38f5c68..131da61a2 100644
--- a/core/modules/filters/inspect.js
+++ b/core/modules/filters/inspect.js
@@ -27,20 +27,14 @@ exports.inspect = function(source,operator,options) {
 				prefix: function(filterRunPrefixFunction,operationFunction,innerOptions) {
 					return function(results,innerSource,innerWidget) {
 						var details ={
+								input: results.toArray(),
 								prefixName: innerOptions.prefixName,
 								operators: []
 							};
 						currentRun = details.operators;
-						var innerResults = filterRunPrefixFunction.call(this,operationFunction,innerOptions),
-							prefixOutput = new $tw.utils.LinkedList();
-						innerResults(prefixOutput,innerSource,innerWidget);
-						var prefixOutputArray = prefixOutput.toArray();
-						details.output = prefixOutputArray;
+						var innerResults = filterRunPrefixFunction.call(null,operationFunction,innerOptions);
+						innerResults(results,innerSource,innerWidget);
 						output.runs.push(details);
-						results.clear();
-						$tw.utils.each(prefixOutputArray,function(title) {
-							results.push(title);
-						});
 					};
 				},
 				operator: function(operatorFunction,innerSource,innerOperator,innerOptions) {
@@ -52,17 +46,17 @@ exports.inspect = function(source,operator,options) {
 							suffixes: innerOperator.suffixes,
 							regexp: innerOperator.regexp,
 							input: []
-						},
-						innerResults = operatorFunction.apply(self,Array.prototype.slice.call(arguments,1));
+						};
 					innerSource(function(tiddler,title) {
 						details.input.push(title);
 					});
 					currentRun.push(details);
+					var innerResults = operatorFunction.apply(null,Array.prototype.slice.call(arguments,1));
 					return innerResults;
 				}
 		}
 	});
-	output.output = compiledFilter.call(this,source,options.widget);
+	output.output = compiledFilter.call(options.wiki,source,options.widget);
 	var results = [];
 	results.push(JSON.stringify(output,null,4));
 	return results;
diff --git a/editions/test/tiddlers/tests/data/filter-wrappers/Simple.tid b/editions/test/tiddlers/tests/data/filter-wrappers/Simple.tid
index 7694292e7..c082fe0d1 100644
--- a/editions/test/tiddlers/tests/data/filter-wrappers/Simple.tid
+++ b/editions/test/tiddlers/tests/data/filter-wrappers/Simple.tid
@@ -29,6 +29,7 @@ title: ExpectedResult
     ],
     "runs": [
         {
+            "input": [],
             "prefixName": "or",
             "operators": [
                 {
@@ -42,12 +43,12 @@ title: ExpectedResult
                         "Output"
                     ]
                 }
-            ],
-            "output": [
-                "1"
             ]
         },
         {
+            "input": [
+                "1"
+            ],
             "prefixName": "or",
             "operators": [
                 {
@@ -61,12 +62,13 @@ title: ExpectedResult
                         "Output"
                     ]
                 }
-            ],
-            "output": [
-                "2"
             ]
         },
         {
+            "input": [
+                "1",
+                "2"
+            ],
             "prefixName": "or",
             "operators": [
                 {
@@ -80,13 +82,12 @@ title: ExpectedResult
                         "Output"
                     ]
                 }
-            ],
-            "output": [
-                "3"
             ]
         }
     ],
     "output": [
+        "1",
+        "2",
         "3"
     ]
 }</p>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/inspect Operator.tid b/editions/tw5.com/tiddlers/filters/inspect Operator.tid
index 44fef6e3d..44460ca1c 100644
--- a/editions/tw5.com/tiddlers/filters/inspect Operator.tid	
+++ b/editions/tw5.com/tiddlers/filters/inspect Operator.tid	
@@ -18,9 +18,9 @@ The JSON object contains the following properties:
 * `output`: the output titles resulting from evaluating the filter
 * `runs`: an array of objects, each of which represents a single run of the filter. Each object contains the following properties:
 ** `prefixName`: the name of the prefix operator that was used in this run
+** `input`: the input titles passed to the prefix operator
 ** `operators`: an array of objects, each of which represents a single operator that was used in this run. Each object contains the following properties:
 *** `operatorName`: the name of the operator
 *** `operands`: an array of string operands passed to the operator
 *** `input`: the input titles passed to the operator
-** `output`: the output titles resulting from evaluating this run