Frank enters the picture
Dennis reverses into Charlie just before Frank introduces himself. At the hospital, Frank announces plans to divorce Barbara and give away his money.
Supporting source ↗CASE FILE · S02 E01
Charlie Gets Crippled
S02 E01Photograph not available
Dennis and Dee's estranged father, Frank Reynolds, returns to town to reconnect with his kids. They don't want anything to do with him, but Frank likes hanging with Charlie and Mac. Meanwhile, Charlie gets hit by Dennis's car (accidentally, of course) and needs to use a wheelchair. The gang soon discovers that this isn't all that bad.
THE SHORT VERSION · SPOILERS AHEAD
INSIDE THE CASE.
An apartment with new company
Frank moves in with Charlie. Their cramped living room becomes a party space, with guests crowded onto the couch and around the table.
Supporting source ↗Borrowed sympathy
Charlie discovers that his injuries attract attention. Mac and Dennis imitate him at the mall, while Charlie and Frank add invented military histories to their approach.
Supporting source ↗Back in the waiting room
Arguments converge outside the club and another collision sends the gang back to the hospital. The final waiting-room scene gathers all five together.
Supporting source ↗THE EVIDENCE
THINGS IN THIS EPISODE.
Characters
Barbara Reynolds3 other recorded episodes
Frank announces his divorce from Barbara; she remains off screen.Source ↗
Charlie Kelly180 other recorded episodes
Charlie slumps in his wheelchair in the hallway, both legs in casts.Source ↗
Dee Reynolds179 other recorded episodes
Dee visits the shopping mall in a dress.Source ↗
Dennis Reynolds176 other recorded episodes
Dennis confronts Dee while holding her decorative lamp.Source ↗
Frank Reynolds171 other recorded episodes
Frank arrives at the hospital in a suit and blue shirt.Source ↗
The apartment guest in a black topOnly recorded here so far
The dark-haired guest holds a beer beside Frank on the couch.Source ↗
The apartment guest in a pink capOnly recorded here so far
The guest in a pink cap sits behind Frank on Charlie’s couch.Source ↗
The wheelchair user at the mallOnly recorded here so far
The bespectacled wheelchair user talks with Mac and Dennis at the mall.Source ↗
Locations
Charlie’s apartment48 other recorded episodes
Frank relaxes with guests on the couch in Charlie’s apartment.Source ↗
Paddy’s Pub147 other recorded episodes
Furniture and family possessions fill the bar.Source ↗
Shopping malls1 other recorded episode
Mac and Dennis roll past shops in the indoor mall.Source ↗
Strip clubs5 other recorded episodes
Mac and Charlie visit a club with a stage and poles.Source ↗
Objects
Compact discs2 other recorded episodes
Charlie carries a stack of CD cases while talking to Mac.Source ↗
Mr. TibbsOnly recorded here so far
Dee retaliates against Dennis by destroying his stuffed elephant, Mr. Tibbs.Source ↗
Wheelchairs2 other recorded episodes
Frank rolls through the strip club in a powered wheelchair.Source ↗
Food & drinks
Beer bottles6 other recorded episodes
The guest beside Frank holds a clear bottle of beer.Source ↗
Schemes
Faking disability1 other recorded episode
Mac and Dennis copy Charlie’s wheelchair strategy to attract women.Source ↗
Costumes
Fake beards2 other recorded episodes
Charlie wears a long false beard with his green jacket and headband.Source ↗
Feather boasOnly recorded here so far
A guest at the apartment wears a bright pink feather boa.Source ↗
Leg casts2 other recorded episodes
Charlie’s two white casts rest on the wheelchair’s foot supports.Source ↗
Military disguises1 other recorded episode
Charlie poses as a Vietnam veteran to attract sympathy at the club.Source ↗
FOLLOW THE THREAD
CONNECTED EPISODES.
S02 E02 
Connected through Leg casts, Wawa, Barbara Reynolds and 8 more.
S02 E06 Connected through Vietnam, Beer bottles, Paddy’s Pub and 5 more.
S01 E02 Connected through Shopping malls, Beer bottles, Paddy’s Pub and 4 more.
S06 E13 
Connected through Crutches, Hospitals, Charlie’s apartment and 6 more.
SOURCES & NOTES.
Tags document researched occurrences, not every appearance. Read the research notes and attribution.