Key points

Sal is definitely a tapeworm.  She comes to terms with this fairly easily, as does boyfriend Nathan.

Sal and Nathan leave Dr Cole’s lab to rescue their dogs, Beverly and Minnie.  In the process, Sal gets bitten by a sleepwalker.  The blood loss and stress cause her to faint.  Upon returning to the lab, they learn that the blood vessels in her brain are weak, and surgery is required to repair them.

Sal is smuggled into a hospital where the surgery is successful. On leaving, she is taken by USAMRIID, and subsequently taken by her former buddy Sherman, who is also a tapeworm chimera.  He wants to kill of the human race. He’s also obsessed with Sal, and while he’s got her, he takes lots of blood and tissue samples.

In other news, Tansy was left behind at SymboGen, and now Dr Banks has her.  He’s doing lots of awful things to her as well.

Sal escapes from Sherman with the help of Ronnie, a chimera who is in a girl’s body even though he’s sure he’s supposed to be male–he remembers the first two bodies he was in, both male, leading to the question of whether the tapeworms have their own memories.

By this time, Dr Cale has relocated her lab to the former Captain Candy factory.  Just as Sal is settling back in with Nathan, Dr Cale shows up with a woman named Anna.  She turns out to be hosting a version of Tansy’s tapeworm that Dr Banks made.

Nathan, Sal, Fang (pronounced Fong) and Fissy (?) set out to rescue Tansy, bringing Dr Banks along so they can get into SymboGen.  He spends the trip generally being a PITA and trying to convince Sal that Sally Mithcell is still somewhere in her brain.  Just as the crew is leaving SymboGen, Colonel Mitchell and USAMRIID show up. Sal pretends to be Sally and goes with the Colonel, allowing the others to escape with Tansy.

Epilogue:  Ronnie has parted ways with Sherman and is up to some agenda of his own….