bought a new appletv today with 4.2.1 on it, how to jailbreak without prior SHSH?

so I got a new appletv today so I don’t have any SHSH saved. How can I jailbreak it? itunes won’t restore any custom firmwares other than the current one right? please help, thank you

Just try the altest SeasonPass.  As I understand it will get the last verion of software from Apple that it can actually Jailbreak (4.2.2).