An heir hired years ago
Franquito is Dennis’s paid accomplice. The supposed family connection has already helped Dennis extract money from Frank.
Supporting source ↗CASE FILE · S10 E09
Frank Retires
S10 E09Photograph not available
After Frank decides he's worked long enough, the rest of the gang strategizes amongst and against each other for control over "Paddy's".
THE SHORT VERSION · SPOILERS AHEAD
INSIDE THE CASE.
The sample cannot answer
The bucket mixes multiple people’s blood with animal traces, leaving Charlie’s paternity unresolved.
Supporting source ↗Paperwork meets furniture
A paper plate governs the contest for an ordinary office chair, elevated into a symbol of control.
Supporting source ↗Retirement changes Frank’s appearance
His energetic exercise gives way to gray hair, pallor and a scooter as the blood-taking continues.
Supporting source ↗THE EVIDENCE
THINGS IN THIS EPISODE.
Characters
Charlie Kelly180 other recorded episodes
Charlie presents his purported paternity documentation.Source ↗
Dee Reynolds179 other recorded episodes
Dee holds the succession agreement.Source ↗
Dennis Reynolds176 other recorded episodes
Dennis introduces the supposed heir.Source ↗
Frank Reynolds171 other recorded episodes
Frank returns looking pale and exhausted.Source ↗
The blood-test doctorOnly recorded here so far
The doctor rejects the contaminated blood sample.Source ↗
Locations
Charlie’s apartment48 other recorded episodes
Frank exercises during his brief retirement.Source ↗
Paddy’s Pub147 other recorded episodes
The ownership confrontation unfolds at Paddy’s.Source ↗
Objects
Birth certificatesOnly recorded here so far
Dee’s birth record supports her claim to being firstborn.Source ↗
Charlie’s blood bucket1 other recorded episode
A metal bucket of blood sits on the doctor’s desk.Source ↗
Hot plates1 other recorded episode
The portable cooking surface serves Charlie’s kitchenette.Source ↗
Paddy’s succession planOnly recorded here so far
The succession rules are written on a paper plate.Source ↗
The butt chairOnly recorded here so far
Dennis investigates the smell of the office chair.Source ↗
Food & drinks
Albani berries1 other recorded episode
Frank has eaten Dee’s remaining scheme berries.Source ↗
Grilled FrankOnly recorded here so far
Charlie prepares Frank’s breakfast at the hot plate.Source ↗
Schemes
Blood oathsOnly recorded here so far
Mac injures his hand while attempting a pledge.Source ↗
Running jokes
Charlie’s illiteracy22 other recorded episodes
The blood signature misspells Charlie’s name.Source ↗
Playing both sidesOnly recorded here so far
Mac announces his supposedly secret strategy.Source ↗
Trundle the GreatOnly recorded here so far
Charlie explains the unusual signature on the agreement.Source ↗
Costumes
Improvised bandages3 other recorded episodes
A makeshift wrap covers Mac’s hand.Source ↗
Miscellaneous
Paternity tests1 other recorded episode
Mac and Charlie bring a bucket as their test sample.Source ↗
FOLLOW THE THREAD
CONNECTED EPISODES.
S09 E04 
Connected through Albani berries, Charlie’s apartment, Paddy’s Pub and 5 more.
S06 E02 
Connected through Hot plates, Paddy’s Pub, Frank Reynolds and 4 more.
S07 E04 Connected through Scooters, Paddy’s Pub, Frank Reynolds and 4 more.
S10 E08 
Connected through Charlie’s blood bucket, Paddy’s Pub, Frank Reynolds and 4 more.
SOURCES & NOTES.
Tags document researched occurrences, not every appearance. Read the research notes and attribution.