Index: contrib/client-side/svnmerge.py
===================================================================
--- contrib/client-side/svnmerge.py	(revision 19340)
+++ contrib/client-side/svnmerge.py	(working copy)
@@ -993,6 +993,18 @@
                       "revisions available to be merged are:",
                       opts["head-url"])
 
+def action_hidden(branch_dir, branch_props):
+    "Show all blocked revisions for the given branch_dir."
+
+    revs = get_blocked_revs(branch_dir, opts["head-path"])
+
+    # Limit to revisions specified by -r (if any)
+    if opts["revision"]:
+        revs = revs & RevisionSet(opts["revision"])
+
+    display_revisions(revs, opts["hidden-display"],
+                      "revisions blocked from view are:", opts["head-url"])
+
 def action_integrated(branch_dir, branch_props):
     """Show change sets already merged.  This set of revisions is
     calculated from taking svnmerge-integrated property from the
@@ -1634,6 +1646,25 @@
     [
         "-f", "-r", "-S", # import common opts
     ]),
+
+    "hidden": (action_hidden,
+    "hidden [OPTION...] [PATH]",
+    """Show the revisions blocked for PATH as a revision list.
+    If --revision is given, the revisions shown will be limited to
+    those also specified in the option.""",
+    [
+        Option("-d", "--diff",
+               dest="hidden-display",
+               value="diffs",
+               default="revisions",
+               help="show corresponding diff instead of revision list"),
+        Option("-l", "--log",
+               dest="hidden-display",
+               value="logs",
+               help="show corresponding log history instead of revision list"),
+        "-r",
+        "-S",
+    ]),
 }