diff --git a/Tests/SimpleDebugClient/Program.cs b/Tests/SimpleDebugClient/Program.cs
index 866d9ce..b815ec1 100644
--- a/Tests/SimpleDebugClient/Program.cs
+++ b/Tests/SimpleDebugClient/Program.cs
@@ -38,6 +38,6 @@ internal class Program
 
     private static void Debugger_InterpreterStep(object? sender, InterpreterEntry e)
     {
-        
+        Console.WriteLine($"[Interpreter] {e}");
     }
 }
\ No newline at end of file
diff --git a/UIX/Microsoft/Iris/Debug/BsonFormatter.cs b/UIX/Microsoft/Iris/Debug/BsonFormatter.cs
index 560cfae..f31d10f 100644
--- a/UIX/Microsoft/Iris/Debug/BsonFormatter.cs
+++ b/UIX/Microsoft/Iris/Debug/BsonFormatter.cs
@@ -2,9 +2,7 @@
 using Newtonsoft.Json.Bson;
 using Newtonsoft.Json.Linq;
 using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using System.Runtime.Serialization;
 
 namespace Microsoft.Iris.Debug;
@@ -40,29 +38,44 @@ internal class BsonFormatter : IFormatter
 
     public object Deserialize(Stream serializationStream)
     {
-        using JsonTextReader reader = new(new StreamReader(serializationStream))
+        using BsonDataReader reader = new(serializationStream)
         {
             CloseInput = false
         };
 
-        var package = (JArray)_serializer.Deserialize(reader);
-
-        // If the type is accessible from the current domain,
-        // create an instance of it.
-        var typeName = package[0].Value<string>();
-        var type = Type.GetType(typeName);
-        if (type != null)
-            return package[1].ToObject(type, _serializer);
-
-        return package[1];
+        BsonPackage package = new(_serializer, reader);
+        return package.Object ?? package.SerializedObject;
     }
 
     public void Serialize(Stream serializationStream, object graph)
     {
-        using JsonTextWriter writer = new(new StreamWriter(serializationStream));
+        using BsonDataWriter writer = new(serializationStream);
         _serializer.Serialize(writer, new[] { graph?.GetType().FullName, graph });
         writer.Flush();
     }
+
+    private class BsonPackage
+    {
+        public BsonPackage(JsonSerializer serializer, JsonReader reader)
+        {
+            var package = (JObject)serializer.Deserialize(reader);
+
+            TypeName = package["0"].Value<string>();
+            SerializedObject = (JObject)package["1"];
+
+            // If the type is accessible from the current domain,
+            // create an instance of it.
+            var type = Type.GetType(TypeName);
+            if (type != null)
+                Object = SerializedObject.ToObject(type, serializer);
+        }
+
+        public string TypeName { get; set; }
+
+        public JObject SerializedObject { get; set; }
+
+        public object Object { get; set; }
+    }
 }
 
 internal class BsonFallbackConverter : JsonConverter
@@ -70,20 +83,36 @@ internal class BsonFallbackConverter : JsonConverter
     public override bool CanConvert(Type objectType)
     {
         return !objectType.Attributes.HasFlag(System.Reflection.TypeAttributes.Serializable)
-            || objectType == typeof(uint) || objectType == typeof(ulong);
+            || objectType.IsEnum || objectType == typeof(uint) || objectType == typeof(ulong)
+            || objectType == typeof(Type);
     }
 
-    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+    public override object ReadJson(JsonReader reader, Type objectType, object jsonValue, JsonSerializer serializer)
     {
-        if (existingValue != null)
+        jsonValue = reader.Value;
+        if (objectType == reader.ValueType)
+            return jsonValue;
+
+        if (objectType == typeof(uint))
+            return BitConverter.ToUInt32((byte[])jsonValue, 0);
+        else if (objectType == typeof(ulong))
+            return BitConverter.ToUInt64((byte[])jsonValue, 0);
+        else if (objectType.IsEnum)
         {
-            if (objectType == typeof(uint))
-                return Convert.ToUInt32(existingValue);
-            else if (objectType == typeof(ulong))
-                return Convert.ToUInt64(existingValue);
+            if (reader.ValueType == typeof(string))
+                return Enum.Parse(objectType, (string)reader.Value);
+
+            return Enum.ToObject(objectType, reader.Value);
+        }
+        else if (objectType == typeof(Type))
+        {
+            if (jsonValue is not string typeName)
+                return null;
+
+            return Type.GetType(typeName);
         }
         
-        return existingValue?.ToString();
+        return jsonValue?.ToString();
     }
 
     public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
diff --git a/UIX/Microsoft/Iris/Debug/Data/InterpreterEntry.cs b/UIX/Microsoft/Iris/Debug/Data/InterpreterEntry.cs
index 005ad6a..26aca79 100644
--- a/UIX/Microsoft/Iris/Debug/Data/InterpreterEntry.cs
+++ b/UIX/Microsoft/Iris/Debug/Data/InterpreterEntry.cs
@@ -8,27 +8,24 @@ namespace Microsoft.Iris.Debug.Data;
 [Serializable]
 public class InterpreterEntry
 {
-    public InterpreterEntry(OpCode opCode, uint offset, string loadUri, params InterpreterObject[] args)
+    public InterpreterEntry() { }
+
+    public InterpreterEntry(OpCode opCode, uint offset, string loadUri)
     {
         OpCode = opCode;
         Offset = offset;
         LoadUri = loadUri;
-
-        if (args != null && args.Length > 0)
-            Parameters = args;
-        else
-            Parameters = new List<InterpreterObject>();
     }
 
-    public OpCode OpCode { get; }
+    public OpCode OpCode { get; set; }
 
-    public uint Offset { get; }
+    public uint Offset { get; set; }
 
-    public string LoadUri { get; }
+    public string LoadUri { get; set; }
 
-    public IList<InterpreterObject> Parameters { get; }
+    public List<InterpreterObject> Parameters { get; } = new();
 
-    public IList<InterpreterObject> ReturnValues { get; } = new List<InterpreterObject>();
+    public List<InterpreterObject> ReturnValues { get; } = new();
 
     public override string ToString()
     {
diff --git a/UIX/Microsoft/Iris/Debug/Data/InterpreterObject.cs b/UIX/Microsoft/Iris/Debug/Data/InterpreterObject.cs
index 143ee60..a931da3 100644
--- a/UIX/Microsoft/Iris/Debug/Data/InterpreterObject.cs
+++ b/UIX/Microsoft/Iris/Debug/Data/InterpreterObject.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Runtime.Serialization;
 
 namespace Microsoft.Iris.Debug.Data;
 
@@ -25,11 +24,13 @@ public class InterpreterObject
         TableIndex = tableIndex;
     }
 
-    public InterpreterObject(object value) : this(null, value?.GetType() ?? typeof(object), value, InstructionObjectSource.Dynamic)
+    public InterpreterObject(object value) : this(null, value?.GetType(), value, InstructionObjectSource.Dynamic)
     {
     }
 
-    public override string ToString() => $"{Type} {Value}";
+    public InterpreterObject() { }
+
+    public override string ToString() => string.Join(" ", Type?.Name, Value?.ToString() ?? "NULL");
 }
 
 /// <summary>