Disclaimer: "Buffy the Vampire Slayer" and all characters from the show are the property of Joss Whedon, Fox, and the UPN Television Network.
Spike (in Tara's shape) comes walking into the Summers' house. Buffy, Giles, Willow, and Xander are inside. They all react. Willow: Tara, you're alive! How? Spike: Not Tara. It's me, Spike. I got hit by some bizarre spell and now I'm in this body. You have to find a way to change me back! Giles: I don't know. I think I prefer you this way. Willow: Definitely. Xander: Me too. Spike (still in Tara's shape) glares at them. Giles (sighing): Very well. I'll go see what I can find out. Later that day, Giles calls the Scoobies together. Giles: I've discovered something most extraordinary. If Spike stays in Tara's form for a week, we can perform a ritual that will result in Spike and Tara both being here in their own bodies. A week later... (The ritual finishes with a big flash of light.) Willow: Tara, you're alive! And ... Oops. We see Tara standing next to what appears to be Jonathan. Spike (from what looks like Jonathan's body): What do you mean "oops"? Xander: Maybe we should just leave well enough alone this time?