Katy Perry on HIMYM
Watch How I Met Your Mother Season 6 Episode 15
"Oh Honey"
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Katy Perry guest stars on this episode of How I Met Your Mother. The singer comes on board as a woman who gets Barney to open up.

Crime Scene Pondering
Watch Castle Season 3 Episode 14
"Lucky Stiff"
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A lottery winner is killed in brutal fashion this week, resulting in a number of suspects. In related news, Martha inherits money she thinks she doesn't deserve.

Totally Out
Watch 90210 Season 3 Episode 14
"All About a Boy"
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Navid learns some major news about Adrianna and her adoption this week. Teddy, meanwhile, gets surprised by who is blackmailing him.

Winning Over the Boss
Watch Gossip Girl Season 4 Episode 14
"Panic Roommate"
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Blair enlists Nate's help to win over her boss. Damien stirs up more drama on the Upper East Side. Chuck finds himself torn between business and pleasure.

Tied Up Characters
Watch Chuck Season 4 Episode 14
"Chuck Versus the Seduction Impossible"
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We're on to a new chapter in the lore of Chuck. During this episode, Chuck and Sarah are set to Morocco to rescue Roan Montgomery.

An Important Patient
Watch House Season 7 Episode 11
"Family Practice"
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Cuddy's mother returns this week, but for a dangerous reason. She falls sick and House goes to extreme lengths to save her.

Photo of Cappie
Watch Greek Season 4 Episode 6
"Fumble"
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Greek tackles a controversial, interesting topic this week. Pregnancy and the morning-after pill are at the center of "Fumble."

Brad Womack, The Bachelor (Again)
Watch The Bachelor Season 15 Episode 6
"Week Six"
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Brad Womack culls the field of Bachelorettes down to six. Will our fan favorites survive? Will he finally get rid of the girls we don't even recognize?

Josh in the Woods
Watch Being Human Season 1 Episode 4
"Wouldn't It Be Nice (If We Were Human)"
Original Air Date:

Josh meets a fellow werewolf this week. Elsewhere, Aidan gets into a co-dependent relationship with Rebecca.

Cadie on Skins
Watch Skins Season 1 Episode 4
"Cadie"
Original Air Date:

Cadie is the focus of this episode. The character tries to come to terms with her eating disorder.