In my mind, <em>ER</em> easily had the best crossover with <em>Friends</em>. Seeing George Clooney as Dr. Doug Ross and Noah Wyle Dr. John Carter pop up as flirty doctors in Monica and Rachel’s apartment was a perfect blend of iconic ‘90s TV worlds. The episode felt natural, funny, and genuinely exciting for fans of both shows. Unlike some forced crossovers later in the series, <em>ER's</em> nailed the chemistry and timing, making it a standout moment that captured ‘90s TV magic at its finest.
