Another week of the writers' strike, another week of us watching mediocre late-night TV so you don't have to. The rimshot-ready Jay Leno reprises his reptile fetish with an animal expert to fill time. B-list actors predominated on the network shows, save for strike-friendly David Letterman, who pulled tabloid-bait hotties Katie Holmes and Katherine Heigl. Jon Stewart had an especially lackluster week of guests, but he made up for it with Samantha Bee segments and a brilliant "Bush's Bucket List" bit on the pres' Middle East tour. Colbert conducted an interview in pitch-perfect español: Everyone's trying to make it work ... but the results are mixed.