The following scene was cut from the original script for Lonely Hearts:
Doyle: “Good. The two of you working separately. Better the odds.”
Angel: “Not of her surviving if she finds this thing before I do.”

Seth Green spoke to Jenelle Riley at Backstage.com on April 11th 2006 about why he left Buffy. He said:

I’m a big fan of the show and enormous fan of Joss Whedon–I love that man. It was a hard thing to walk away. But when I signed on to that show, …

In I Fall To Pieces, Melissa asks Doyle how many cases Angel has handled, to which Doyle replies: “Well, exactly like yours? Not quite so many. But protecting young women such as yourself? Yeah, there’ve been – ah – 4. And 3 of them are very …

In I Fall To Pieces, Dr Meltzer tells Melissa that he has changed her pin number, types in the right pin in the machine. Just as she is leaving he says, “don’t forget your money”. All he did was enter her pin number, nothing else, so why would the cash …

This dialogue was cut from the original script for I Fall To Pieces:
Penny: “I sent my husband a bouquet the day the divorce was final.”
John: “And they say there’s no romance left in the world.”

In In the Dark, Oz says “Yeah, your old buddy Spike dug up Sunnydale looking for it - but he got a fistful of Buffy and left it behind.” This could be reference to the western A Fistful of Dollars.

Cordelia references the fashion designer Versace in In the Dark when she says, “Since when did you get all Versace about accessorising?”

This line describing the sadistic Marcus in ‘In the Dark‘ was cut from the episode:
“Marcus was run out of Novi Grad by a pack of angry Howler demons for his antics with some local sprites - and you know Howler demons, they’ll hook up with anything.”

In ‘In the Dark‘, Cordelia and Doyle have the following conversation:

Cordelia: “Please. I couldn’t get comfortable in here if the floor was lined with mink. I mean, how can you live like this?”
Doyle: “Well, I didn’t until last week. Then I saw what you did …

Doyle’s apartment is described in the script for ‘In the Dark‘ as:
It is, almost literally, the bachelor pad from Hell. Piles of laundry, crushed beer cans, and take out food cartons lie scattered about, mixed in with some super-natural knick knacks: a goats skull, black candles, books.

When Angel and Kate escape from the basement in Lonely Hearts, they run past a mirror, in which you can see Angel’s reflection.

The boom mic can be seen on screen, just above Cordelia’s head in ‘In the Dark‘.

Whilst talking about Angela’s Ashes with Doyle in ‘In the Dark‘, Cordelia says, “I doubt very much that the main characters are Betty and Barney Rubble - as you so vehemently insisted last night. Also, I don’t think Oz apprecieated being called my little Bam Bam all night”
Betty and …

In ‘In the Dark‘, Cordelia says to Doyle: “I think the trick is laying of the ale before you start quoting Angela’s Ashes and weeping like a baby man.” Angela’s Ashes is Frank McCourt’s autobiography about his childhood in Limerick, Ireland.

Doug Petrie included the following line in the script’s stage directions, describing Marcus’ torture paraphernelia in ‘In the Dark:
Marcus opens a battered old trunk filled with torture implements - among them we see a cat’s paw, a breast ripper, a heretic’s fork, “the pear”, etc.