diff --git a/_episodes/05-bonus-mpi-for-pi.md b/_episodes/05-mpi-for-pi.md
similarity index 99%
rename from _episodes/05-bonus-mpi-for-pi.md
rename to _episodes/05-mpi-for-pi.md
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--- a/_episodes/05-bonus-mpi-for-pi.md
+++ b/_episodes/05-mpi-for-pi.md
@@ -1,5 +1,5 @@
 ---
-title: "Bonus session: Distributing computations among computers"
+title: "Using MPI to distribute computations among computers"
 teaching: 45
 exercises: 10
 questions:
diff --git a/_episodes/06-parallel-profiling.md b/_episodes/06-parallel-profiling.md
new file mode 100644
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+++ b/_episodes/06-parallel-profiling.md
@@ -0,0 +1,22 @@
+---
+title: "Profiling parallel programs"
+teaching: 45
+exercises: 10
+questions:
+- "How do I profile a program using the message passing interface (MPI)?"
+objectives:
+- "Profile a program to examine computation and communication bottlenecks"
+keypoints:
+- "Profiling can help explain how to speed up code."
+- "Parallel profiling tools are similar to serial ones, but typicaly add
+   communication and computation imbalance information"
+---
+
+## Parallel Profiling and Tracing Tools
+
+There are a number of portable open source parallel profiling and tracing tools
+including
+- [HPCToolkit](http://hpctoolkit.org/)
+- [Extrae](https://tools.bsc.es/extrae)
+- [Scalasca](http://www.scalasca.org/)
+- [TAU](https://www.cs.uoregon.edu/research/tau/home.php)