Doppelgangershow I Met Your Mother : Season 5 E... -

But as the camera panned away from the happy couple, we saw "Dr. Stangel" pull a blonde wig and a suit out of his medical bag. Barney Stinson smirked, checked his reflection in the glass, and hailed a cab. He hadn't just fooled a girl; he’d fooled his best friends to help them find the courage to grow up. It was, as Barney would say, the ultimate wingman move.

"There he is," Lily whispered. "Dr. John Stangel. The fifth doppelgänger."

The year was 2010, and the gang was on a mission. It wasn’t about a legendary night at MacLaren’s or Barney’s latest "Playbook" entry. It was about the universe giving Marshall and Lily a sign.

Finally, while walking down a busy street in Manhattan, Lily froze. Across the intersection stood a man with slicked-back hair, a sharp jawline, and the unmistakable "Stinson" aura. But he wasn’t wearing a suit. He was wearing a lab coat and holding a stethoscope.

The group crowded around. He looked exactly like Barney, but he was a respected physician. He didn't say "suit up," he said "check up." The pact was fulfilled. Marshall and Lily headed home, ready to start the next chapter of their lives, convinced the universe had finally signaled its approval.