The gym confrontation
Carmen introduces her husband, Nick. Mac returns with scripture, but his argument keeps circling back to his own jealousy.
Supporting source ↗CASE FILE · S06 E01
Mac Fights Gay Marriage
S06 E01Photograph not available
Mac defends traditional marriage, while the rest of the gang reap the rewards of wedded bliss.
THE SHORT VERSION · SPOILERS AHEAD
INSIDE THE CASE.
A practical partnership
Charlie’s back pain prompts a plan to join Frank’s health coverage. Their supposedly simple arrangement produces a stack of forms.
Supporting source ↗A reunion accelerated
Dennis reconnects with Maureen and abruptly marries her. Mac loses both his apartment and the perks attached to Dennis’s accounts.
Supporting source ↗The new domestic picture
Maureen’s cat-themed clothes and conspicuous tooth punctuate the final scene. Dennis’s enthusiasm has visibly faded by the end of the evening.
Supporting source ↗THE EVIDENCE
THINGS IN THIS EPISODE.
Characters
Bill Ponderosa10 other recorded episodes
Bill accompanies his sister to meet Dennis and Dee.Source ↗
Charlie Kelly180 other recorded episodes
Charlie lifts Frank while trying to relieve their back pain.Source ↗
Dee Reynolds179 other recorded episodes
Dee joins Dennis at the sandwich shop.Source ↗
Dennis Reynolds176 other recorded episodes
Dennis talks with Maureen over breakfast.Source ↗
Frank Reynolds171 other recorded episodes
Frank grimaces during the improvised back adjustment.Source ↗
Maureen Ponderosa7 other recorded episodes
Maureen sits across from Dennis during their reunion.Source ↗
Locations
City Fitness1 other recorded episode
The City Fitness name is visible above the entrance.Source ↗
Dee’s apartment29 other recorded episodes
Mac and Dee react to the discovery of Bill in her apartment.Source ↗
Mac and Dennis’s apartment20 other recorded episodes
Dennis tells Mac to leave their shared apartment.Source ↗
Paddy’s Pub147 other recorded episodes
The group discusses marriage around the bar.Source ↗
Objects
Penny jarsOnly recorded here so far
Charlie struggles to move Frank’s saved pennies.Source ↗
Treadmills1 other recorded episode
Carmen is interrupted again while using a treadmill.Source ↗
Food & drinks
Schemes
Domestic partnership1 other recorded episode
Charlie sorts the large stack of partnership paperwork.Source ↗
Health insurance2 other recorded episodes
Charlie wants the partnership so he can access Frank’s health insurance.Source ↗
Running jokes
Maureen’s dead toothOnly recorded here so far
A close-up reveals Maureen’s discolored tooth.Source ↗
Costumes
Cat sweatshirts1 other recorded episode
Maureen wears a decorated cat top while speaking to Dennis.Source ↗
Miscellaneous
Lethal Weapon 52 other recorded episodes
Dennis mentions the gang’s homemade sequel while recommending movies.Source ↗
FOLLOW THE THREAD
CONNECTED EPISODES.
S04 E10 Connected through City Fitness, Treadmills, Health insurance and 6 more.
S06 E02 Connected through Cat sweatshirts, Domestic partnership, Maureen Ponderosa and 9 more.
S06 E12 
Connected through Nick, Carmen, Bill Ponderosa and 6 more.
S01 E02 Connected through Health insurance, The Bible, Paddy’s Pub and 4 more.
SOURCES & NOTES.
Tags document researched occurrences, not every appearance. Read the research notes and attribution.