Now that the Grey's Anatomy-Private Practice crossover event is underway, we challenged readers to get creative and tell us what crossover stunts they would cook up if they ran the networks. Click ahead to see the best ideas.

"I'd love to see a Smallville/Supernatural crossover, if only for the fun I can imagine of the Jason/Dean "confusion" from the Smallville crew (assuming they'd even acknowledge the fact). Sam and Dean could hunt Lana Lang — because "what's dead should stay dead." I think the ratings for both shows would go through the roof." — blogette

"As a lover of sci-fi, I think it would totally be funny if Battlestar Galactica crossed over to Stargate, since Atlantis ended on Earth. It could explore how BSG finally makes it to a real, livable Earth, and how they would run into the middle of Stargate's battle with the Ori, Wraith, and Gou'ld and such." — aznrycegrl

"Terminator and Dollhouse. Catherine (Shirley Manson) hires Echo to get close to John (Thomas Dekker), which really ticks off Cameron (Summer Glau)." — mhsimkin

"How I Met Your Mother and The Big Bang Theory! How amazing would it be to have Barney Stinson and Sheldon Cooper in the same scene?" — Melfman1

"My true dream crossover would actually be Psych/Veronica Mars. Imagine the greatness, if you will. Shawn and Veronica. Gus and Wallace. Lassie and Lamb. (Let's pretend for a second that Season 3 of Veronica Mars doesn't exist....) Henry and Keith. Logan mocking Shawn's "psychic abilities"! I think you get my point.— blogette

"I think a Bones and House crossover would be the ultimate Fox crossover. After identifying a female body found in D.C., Booth and Bones attempt to contact her next of kin, a sister in New Jersey. However, the sister is on her deathbed with House and his team trying to save her. Booth, Bones and the squints race against time to solve the murder, while House and his team race the clock to save the patient's life. With a little healthy competition between House and Bones intelligence for sure." — allthefamily5

"I really really want to see Heroes and Lost come together. They have so many... similarities. Plus, Ben would totally kick Claire's ass." — thebitterhero

"Even though the latter show is no longer on the air, I would love to have seen a 24/The Shield crossover, even if it was just Vic Mackey or his crew popping in for a couple of hours during one of Jack's bad days. Both shows have Los Angeles settings, and both shows are gritty, which would make it an obvious fit." — Glurb

"How about an American Idol/Hell's Kitchen crossover? Worst singer has to eat the worst cook's food, and the worst cook has to listen to the worst singer's singing." — Jeffumm

"How about Lost and Fringe? We've already seen a plane ticket for Oceanic Airlines on Fringe, Agent Phillip Broyles and Matthew Abaddon (both played by Lance Reddick) could actually be one and the same person, and everything that the island can do is related to the pattern!" — JBR119

"Do we have any really good Telly Savalas lookalikes running around these days? Kojak debuted in the 1973-74 television season, and was a cop show that took place in New York City. Why not have a Kojak/Life on Mars crossover? Wouldn't it be fun if Detective Sam Tyler ran into Detective Theo Kojak? The 125th meets the 13th! Who loves ya, baby?" — Jeffumm