Complex sentence: Radar tells Hawkeye and B.J. that someone from Fort Wayne passed through the 4077 and relayed word back home, which eventually got back to Louise Burns, of Frank's affair and that she hired a divorce attorney.
Split into simpler sentences: Radar tells Hawkeye and B.J. that someone from Fort Wayne passed through the 4077th and relayed word back home of Frank's affair. The gossip eventually got back to Louise Burns and she hired a divorce attorney.