A musical with a motive
Charlie announces an original show and insists there is no hidden agenda. The finale reveals that the production was built around a proposal to the Waitress.
Supporting source ↗CASE FILE · S04 E13

Charlie puts on a rock opera based on his song "Nightman," and he gets the rest of the gang to help him.
THE SHORT VERSION · SPOILERS AHEAD
Charlie announces an original show and insists there is no hidden agenda. The finale reveals that the production was built around a proposal to the Waitress.
Supporting source ↗Artemis helps turn Charlie’s writing into a usable script. Role changes, unwanted additions and disagreements over the staging repeatedly interrupt his direction.
Supporting source ↗The production gives Dee a princess dress, Frank a ragged troll outfit and Mac a black Nightman costume. Dennis changes from pajamas into the silver Dayman outfit.
Supporting source ↗Gladys takes over the piano for the performance. Charlie appears in a yellow suit before a sun prop, but the Waitress refuses his proposal and leaves.
Supporting source ↗THE EVIDENCE
Artemis stands beside Charlie holding the script during the initial rehearsal.Source ↗
Charlie plays the upright piano while rehearsing Dennis and Dee’s scene.Source ↗
Dee performs opposite Dennis wearing the pink princess costume.Source ↗
Dennis sits on the stage bed in pale blue pajamas as the boy character.Source ↗
Frank sits in an ornate chair wearing the troll costume and wig.Source ↗
Artemis brings Gladys backstage as Charlie introduces the show’s pianist.Source ↗
Mac performs the staged confrontation with Dennis in the Nightman outfit.Source ↗
The Waitress sits among the audience members watching the production.Source ↗
Dennis and Mac play pool in the bar before Charlie announces the musical.Source ↗
A large black blanket covers Mac and Dennis during rehearsal.Source ↗
Frank wears black-framed glasses while rehearsing.Source ↗
The Waitress reaches a folding chair marked reserved.Source ↗
Dennis and Mac argue in front of bulb-lit dressing-room mirrors.Source ↗
Painted coffee-counter scenery places Dee’s princess in a fictional shop.Source ↗
Waitress mentions carrying Mace.Source ↗
Dennis lines up a shot at Paddy’s green-felt pool table while Mac holds a cue.Source ↗
Artemis holds printed script pages during rehearsal.Source ↗
Dennis raises a red prop heart after defeating Mac’s Nightman.Source ↗
Dennis sits on the painted bed prop during the Nightman scene.Source ↗
A large orange-and-yellow sun prop stands behind Charlie during his finale.Source ↗
A red stepladder stands behind Dee during rehearsal.Source ↗
The Waitress holds a printed program while confronting Charlie.Source ↗
Charlie shows the Waitress a paper ticket outside the rowhouses.Source ↗
Charlie demands Frank surrender his gum.Source ↗
Charlie promises to leave the Waitress alone if she attends.Source ↗
Charlie’s surprise finale becomes a proposal to the Waitress, who rejects him.Source ↗
Artemis explains that she added words while transcribing Charlie’s original work.Source ↗
Waitress recalls unwanted calls and being followed.Source ↗
Charlie raises both hands above his head.Source ↗
The four costumed performers dance together across the front of the stage.Source ↗
Frank's pronunciation changes the toll's meaning.Source ↗
A close-up of Mac at the curtain reveals the Nightman’s unusual eyes.Source ↗
Dennis steps onto the stage in a pale silver jumpsuit with black briefs and shoes.Source ↗
Mac appears at the curtain in black stage clothes and heavy eye makeup.Source ↗
Dee’s costume combines a bright pink dress, a dark sash and a small tiara.Source ↗
Frank wears pointed artificial ears for the troll role.Source ↗
Frank’s troll wears layered brown rags and a long gray wig.Source ↗
Charlie wears a yellow suit and waistcoat with a white top hat.Source ↗
Charlie sings his proposal.Source ↗
The cast performs the Dayman number together near the end of the show.Source ↗
Dee performs her addition.Source ↗
Charlie accompanies the rehearsal on an upright piano at the side of the stage.Source ↗
Dee and Dennis sing together.Source ↗
Frank performs his number.Source ↗
Gladys claims friendship with Calvin Coolidge.Source ↗
Frank, Dee, Dennis and Mac perform together in Charlie’s staged musical.Source ↗
Dee adds an unauthorized disclaimer song.Source ↗
Tags document researched occurrences, not every appearance. Read the research notes and attribution.