Let's count all of the hidden references to classic Samurai Jack
This episode had quite a few, and they're all worth revisiting, since they came from both old episodes as well as riffs on other heroic tales from pop culture and history:
The Three (Formerly Blind) Archers -- These are the archers Ashi ran into. They were blinded and imprisoned as the guardians of a time portal, and Jack had to defeat them in a mostly dialogue-free, much-beloved early episode "Jack and the Three Blind Archers." At the end of that episode, they regained their sight.
The Woolies -- Another Season 1 callback, the Woolies are a sentient race who were subjugated and set to perform hard labor by the Chritchellites. Jack saved their butts in "Jack, the Woolies, and the Chritchellites."
Olivia and the Ravers -- She's the DJ at the rave Ashi discovers, and Jack saved her as a small child from a mind-controlling DJ in the episode "Jack and the Rave." Ashi's dance in this episode also echoed Jack's dance from the original episode.
Da Samurai -- He was an aspiring, and funkier, samurai that Jack met in his travels, when he completely embarrassed Da Samurai in "Samurai versus Samurai." Keegan-Michael Key voiced him in this episode.
Demongo, The Soul Collector -- He enters Da Samurai's bar and went toe-to-toe against Jack in his own Season 2 episode "Jack versus Demongo, The Soul Collector."
Hexbucket Seaport -- As pointed out by the podcasters at "Samurai Jack Cast," the seaport Scaramouche uses to get on his boat toward Aku is Hexbucket Seaport and made an appearance in the Scotsman's last episode in the original four seasons "The Scotsman Saves Jack."
Batman -- Also pointed out by the folks at "Samurai Jack Cast," the music cues when Ashi looks up at the Archers and they lead her to their mountain home is very reminiscent of both Hans Zimmer's score to in The Dark Knight as well as Danny Elfman's theme from Batman: The Animated Series.
Big Dog from 2 Stupid Dogs, Spike from Tom & Jerry, Astro from The Jetsons -- All these dogs make a silly cameo as the dogs Scaramouche meets. They never did in the first four seasons of Samurai Jack, to my knowledge, but are all Hanna-Barbera or Cartoon Network properties.
Tinkerbell -- If Ashi's new look doesn't look familiar, look again. She's a dead ringer for Peter Pan's Tinkerbell.
Popeye the Sailor Man -- He makes a blink-and-you-miss-it cameo as one robots Ashi encounters in Da Samurai's bar.
The Graveyard -- Jack was led to the same graveyard in the episode "Jack and the Zombies," but none of the ghosts or zombies from that episode made an appearance here.
Honda Tadakatsu -- As we pointed out last week, The Omen looks a lot like this samurai from feudal Japan, down to the antlered headgear.