diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -197,10 +197,17 @@
         Just e' -> evalKeyPath config ks e'
         Nothing -> Null
 -- traverse array elements with additional keys
+-- if key is _, e.g. cast._[0] , traverse INTO each array object
+-- e.g. "cast":[["Michael Caine",13473],["Demi Moore",65231],...
+evalKeyPath config@Config{..} (Key "_":ks) (Array v) = 
+      String . mconcat . intersperse arrayDelim $ map (evalToText config ks) (V.toList v)
+-- traverse array elements with additional keys
+
 evalKeyPath _ ks@(Key key:_) (Array v) | V.null v = Null
 evalKeyPath config@Config{..} ks@(Key key:_) (Array v) = 
       let vs = V.toList v
       in String . mconcat . intersperse arrayDelim $ map (evalToText config ks) vs
+
 evalKeyPath _ ((Index _):_) _ = Null
 evalKeyPath _ _ _ = Null
 
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -78,6 +78,21 @@
 Interstellar                2014  Matthew McConaughey,Anne Hathaway     8.9
 ```
 
+## Mapping an array index getter over nested arrays
+
+As of version 0.1.5.0, you can map an index getter over arrays, such as this
+
+    {"id":2,"cast":[["Michael Caine",13473],["Demi Moore",65231]]}
+
+with this expression
+
+    jsontsv -a '|' 'cast._[0]'
+
+This results in:
+    
+    2   Michael Caine|Demi Moore
+
+
 ## Installation
 
 Assuming you have a recent version of the [Haskell
diff --git a/jsontsv.cabal b/jsontsv.cabal
--- a/jsontsv.cabal
+++ b/jsontsv.cabal
@@ -2,7 +2,7 @@
 --  see http://haskell.org/cabal/users-guide/
 
 name:                jsontsv
-version:             0.1.4.6
+version:             0.1.5.0
 synopsis:            JSON to TSV transformer
 homepage:            https://github.com/danchoi/jsontsv
 description:         Transforms JSON into tab-separated line-oriented output, for easier processing in Unix-style pipelines.