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Path: utzoo!utcsri!utai!utflis!brown
From: brown@utflis.UUCP (Susan Brown)
Newsgroups: net.startrek
Subject: Re: Where Were They?
Message-ID: <195@utflis.UUCP>
Date: Thu, 4-Jul-85 13:51:40 EDT
Article-I.D.: utflis.195
Posted: Thu Jul  4 13:51:40 1985
Date-Received: Thu, 4-Jul-85 15:44:15 EDT
References: <515@hoxna.UUCP> <24900103@uiucdcs>
Reply-To: brown@utflis.UUCP (Susan Brown)
Organization: FLIS, University of Toronto
Lines: 11
Summary: 

In article <24900103@uiucdcs> dahlback@uiucdcs.Uiuc.ARPA writes:
>
>I seem to remember there was one episode in which the Enterprise attempted
>to leave the galaxy and got in big trouble--some kind of force field
>grabbed the ship, I believe. "The  Web"? Does anybody remember?
>
>dahlback@uiucdcs

The Tholian Web fits your title description.  The Enterprise was not 
trying deliberately to leave the galaxy however; that would be Where No
Man Has Gone Before.