Complex sentence: One of its stars Alec Baldwin, who played Dr. Hal Wexler in an episode gave mouth-to-mouth resuscitation to guest star Chad Allen, who recalled this event with great fondness years later.
Split into simpler sentences: One of its stars was Alec Baldwin, who played Dr. Hal Wexler. In an episode he gave mouth-to-mouth resuscitation to guest star Chad Allen, who recalled this event with great fondness years later.