Ambush
... that "Ambush", the fourth-season premiere episode of ER, was filmed live twice, for the East and West Coasts?
... that "<b id="mwBQY"><a href="./Ambush_(ER)" id="mwBQc" rel="mw:WikiLink" title="Ambush (ER)">Ambush</a></b>", the <a href="./ER_(season_4)" id="mwBQg" rel="mw:WikiLink" title="ER (season 4)">fourth-season</a> premiere episode of <i id="mwBQk"><a href="./ER_(TV_series)" id="mwBQo" rel="mw:WikiLink" title="ER (TV series)">ER</a></i>, was filmed live twice, for the East and West Coasts?