Mr- President - 1987 The Language Barrier 2-5 was released on:
USA: 24 October 1987
Voyage Trekkers - 2011 Language Barrier 1-4 was released on: USA: 7 August 2011
Midnight Caller - 1988 The Language Barrier 3-2 was released on: USA: 5 October 1990
The Barrier - 1913 was released on: USA: 5 March 1913
The Barrier - 1917 was released on: USA: 25 February 1917
The Barrier of Blood - 1913 was released on: USA: November 1913
The Greater Barrier - 1915 was released on: USA: 12 March 1915
Barrier Busters - 1925 was released on: USA: 6 September 1925
Bucking the Barrier - 1923 was released on: USA: 1 April 1923
The Barrier Between - 1915 was released on: USA: 8 January 1915
The Broken Barrier - 1914 I was released on: USA: 27 July 1914
The Barrier That Was Burned - 1912 was released on: USA: 26 July 1912
The Barrier of Flames - 1914 was released on: USA: 15 December 1914