Alice, a maid in Lydia Andrews' house, is hastily loaded into Bert and Cec's cab after a bad abortion from "Butcher George." After the pair rush her to a proper hospital, Cec spends a considerable amount of time comforting Alice during her recovery and supporting her while she's questioned, even though they just met (see the note for Raisins and Almonds below).
After what happened with her previous employers, Dot is taken in without hesitation by Phryne; despite Dot being Catholic and Phryne being Protestant, it's pointed out that for a Catholic, a Protestant makes for a better employer than a drug baroness and the rapist she murdered.
In "Murder on the Ballarat Train," Phryne, despite her misgivings about dealing with children, takes in Jane herself rather than see her sent to an orphanage. It's heavily implied in her later conversation with Jack that Phryne is building herself a Family of Choice to replace those she's lost - and they all do end up becoming each other's family.
"Raisins and Almonds,":
Also serving as a Continuity Nod to "Cocaine Blues" above, Cec is revealed to have gotten engaged to Alice.
Cec's engagement also causes friction with Bert: After they spend the entire episode at each other's throats due to Cec considering buying a farm to provide for Alice, he ultimately decides to stay in Melbourne with the taxi business after all. Although Bert falsely claims that the buyer for Cec's share in the cab backed out, it's implied Cec still lets it go because he can't imagine his life without Bert in it. The looks on both their faces as they decide to go mend fences over pints are truly sweet. Heterosexual Life-Partners indeed.
In "Queen of the Flowers", Phryne shows off her Mama Bear instincts, and how much she's bonded with Jane, reflexively referring to her as "my daughter".
In "Death by Miss Adventure," Mac winds up suspended from the hospital due to "indecent activities" (officially, for distributing literature on birth control at the Gaskin factory; Aunt Prudence none-too-subtly hints that the real reason is institutional homophobia) and then arrested due to being suspected in a murder. Phryne immediately visits her in the lockup, and learns the real reason she'd been hanging around the factory: she was romantically involved with one of the factory workers. Mac looks like she'd expect Phryne to condemn her, but instead Phryne responds with a "How long have we been friends?" and a warm hug. And then promptly sets out to clear her name.
In the end of "Dead Man's Chest", we get to see more of Prudence's more caring side when she decides to stay behind in Queenscliff to help her old friend deal with the social fallout of her exposed alcoholism and her son's arrest for murder.
Prudence: Hilly, you remember those hours spent over Virgil? "Omnia vincit amor" - love conquers all. I'm going to stay on here for a few days, and we'll face society together.
Beatrice from "The Blood of Juana the Mad" is treated like a freak for what is clearly undiagnosed autism. Phryne and Dot do their best to understand the young woman and accept her idiosyncrasies, becoming the few real friends Beatrice has.
Jack admitting in "Blood on the Wheel" that he found the prospect of losing Phryne "unbearable".
In "Dead Air", Jack is undercover at a radio station and Phryne comes across him in the course of her own investigation. She expects him to be cross with her; instead, what she gets is an astounding display of trust in her talents and professionalism on Jack's part. Phryne can hardly believe her ears.
Phryne: Now, before you say anything, "Archibald" —
Jack: Thank goodness you're here. I need you to move in on this case. Collins can't handle this alone.
In "Unnatural Habits", Phryne convinces Prudence to give a young girl, Mary, who is pregnant out of wedlock and has been forced to live and work in a nunnery's laundry service, a job as a housekeeper so she won't have to go back there. Though Prudence isn't too fond of the situation, when Mary goes into labor, she is nothing but supportive and helpful, crossing over with Moment of Awesome:
Mary: Bless me, Father, for I have sinned! I have been bad and wicked, and God is gonna let the nuns take my baby away! Prudence: God will do nothing of the kind, or he'll be answerable to me!
In "Murder under the Mistletoe", after Phryne suspects that a murder has happened, Dot calls Hugh and tells him. He then relays it to Jack. The next time we see them, they arrive at the mansion where Phryne and the others are staying, having hightailed it through the harsh weather to help her.
"Death & Hysteria" has the oddest of Odd Friendships between blunt-speaking working-class 'red-ragger' (Communist) Bert and very properOld Moneysociety matron Prudence. However, it's explained after it's revealed that Bert, Cess, and Prudence's much loved and rather lonely developmentally disabled son Arthur had become good friends. Throughout the episode, Bert does his best to convince Prudence to drop the Stiff Upper Lip mentality and allow herself to grieve over her son's death, keeping secret the fact that she's been sleepwalking and calling out for scallop pies (Arthur's favourite), even from Phryne. Ultimately, he succeeds where Phryne and a very skilled psychiatrist failed, and the episode ends with Prudence weeping and Bert's comforting arm around her shoulder.