diff --git a/bin/mumbai-challenger.env b/bin/mumbai-challenger.env
new file mode 100755
index 000000000..d312bd957
--- /dev/null
+++ b/bin/mumbai-challenger.env
@@ -0,0 +1,17 @@
+#! /bin/bash
+set -o allexport
+BLOCKCHAIN_URL="$2"
+CHALLENGER_KEY="$1"
+NF_SERVICES_TO_START='optimist'
+APP_SERVICES_TO_START='challenger'
+ENVIRONMENT=mumbai
+USE_EXTERNAL_NODE=true
+ERC20_COIN=WMATIC
+FEE_L2_TOKEN_ID=WMATIC
+ETH_NETWORK=mumbai
+DEPLOY_MOCKED_SANCTIONS_CONTRACT=
+STATE_GENESIS_BLOCK=32132680
+CONFIRMATIONS=12
+OPTIMIST_HOST='localhost'
+OPTIMIST_WS_PORT='8082'
+set +o allexport
\ No newline at end of file
diff --git a/bin/start-apps b/bin/start-apps
index ec4f075f6..6e13fdad4 100755
--- a/bin/start-apps
+++ b/bin/start-apps
@@ -1,2 +1,36 @@
 #! /bin/bash
-docker-compose -f docker/docker-compose.apps.yml -p 'nightfall_3' up
+
+trap "docker-compose -f docker/docker-compose.apps.yml -p 'nightfall_3' down --remove-orphans -t 1; exit 1" SIGHUP SIGINT SIGTERM
+
+usage()
+{
+  echo "Usage:"
+  echo "  -c or --challenger; to start the challenger"
+  echo "  -p or --proposer; to start the proposer"
+  echo "  -h or --help; to print this message"
+  echo "If nothing is specified then both challenger and proposer will be run"
+  echo "if APP_SERVICES_TO _START is exported then it will override the above, acceptable values are 'challenger', 'proposer', 'challenger,proposer'"
+}
+# if APP_SERVICES_TO_START already exists then it overrides anything we attempt to set with this script.
+if [ -z "$APP_SERVICES_TO_START" ]; then
+    if [ -z "$$1" ]; then
+    APP_SERVICES_TO_START="challenger,proposer"
+    fi
+
+    while [ -n "$1" ]; do
+    case $1 in
+        -c  | --challenger )            APP_SERVICES_TO_START=$APP_SERVICES_TO_START" challenger"
+                                        ;;
+        -p  | --proposer )              APP_SERVICES_TO_START=$APP_SERVICES_TO_START" proposer"
+                                        ;;
+        -h  | --help )                  usage
+                                        exit 0
+                                        ;;
+        * )                             usage
+                                        exit 1
+        esac
+    shift
+    done
+fi
+
+docker-compose -f docker/docker-compose.apps.yml -p 'nightfall_3' up ${APP_SERVICES_TO_START//,/ }