When "Carrie" debuted on CBS in October 1978, TV censorship was heavy. It was commonplace at the time for the networks to sub in alternate footage to replace objectionable shots and hire sound-alike actors to dub out profanity (often badly). Viewers got a major surprise when they discovered there was an alternate version of the lockerroom scene that didn't include any nudity. This version features white titles (as opposed to the normal red ones), several different shots... and Nancy Allen clad in a towel. This alternate opening continued to air on TV throughout the '80s but since television censorship has become less restrictive, this print has completely fallen out of circulation (just like many other beloved films that once were aired with alternate and deleted footage throughout the '70s & '80s). Major thanks to Ryan for providing this long-lost clip for the site:
A higher quality version of the clip above (.mp4, 41 MB) is available to download here.
There are two other versions that have also been seen. These days the normal theatrical version of the scene generally airs on TV with strategically placed fogging that blurs out the nudity. This version is the one most frequently seen on cable and network TV. The print that runs on A&E, however, is strange -- it's the theatrical version but they've added some light fogging and seemingly animated underwear onto Nancy Allen. Initially I thought this was the alternate scene but (as you can see from the clip above and comments below) it's not. Since this version airs less frequently, I decided to leave it here for posterity: