When Mordecai and Rigby meet a caveman, they decide to put his unique prehistoric physique to good use: chugging cheese! But could this caveman actually turn out to be a Neanderthal nuisance?.

Episode Viewers and Ratings

Season 4 Episode 18 of Regular Show resulted in a 0.00 rating in the 18-49 demographic.

Regular Show Season 4 Episodes...

• s04e01 - Exit 9B Part 1
• s04e02 - Exit 9B Part 2
• s04e03 - Starter Pack
• s04e04 - Regular Show Presents Terror Tales of the Park II
• s04e05 - Pie Contest
• s04e06 - 150-Piece Kit
• s04e07 - Bald Spot
• s04e08 - Guy's Night
• s04e09 - One Pull Up
• s04e10 - The Christmas Special, Part 1
• s04e11 - The Christmas Special, Part 2
• s04e12 - Firework Run
• s04e13 - The Longest Weekend
• s04e14 - Sandwich of Death
• s04e15 - Ace Balthazar Lives
• s04e16 - Do or Diaper
• s04e17 - Quips
• s04e18 - Caveman
• s04e19 - That's My Television
• s04e20 - A Bunch of Full Grown Geese
• s04e21 - Fool Me Twice
• s04e22 - Limousine Lunchtime
• s04e23 - Picking Up Margaret
• s04e24 - K.I.L.I.T. Radio
• s04e25 - Carter and Briggs
• s04e26 - Skips' Stress
• s04e27 - Cool Cubed
• s04e28 - Trailer Trashed
• s04e29 - Meteor Moves
• s04e30 - Family BBQ
• s04e31 - The Last LaserDisc Player
• s04e32 - Country Club
• s04e33 - Blind Trust
• s04e34 - World's Best Boss
• s04e35 - Last Meal
• s04e36 - Sleep Fighter
• s04e37 - Party Re-Pete
• s04e38 - Steak Me Amadeus

Regular Show Show Summary

Two groundskeepers, Mordecai (a six-foot-tall blue jay) and Rigby (a hyperactive raccoon) are best friends who spend their days trying to entertain themselves by any means necessary, much to the displeasure of Benson (their boss, who is a gumball machine) and to the delight of Pops (an older, lollipop-headed gentleman).

Their everyday pursuits often lead to things spiraling out of control and into the surreal: they open portals to other dimensions, summon demons via an -80s arcade game and accidentally use choreographed dance moves to send co-workers to the moon.