'Battlestar Galactica''s Katee Sackhoff Guests on 'Big Bang Theory' (VIDEO)

On 'The Big Bang Theory,' wannabe ladies man Howard settles into a bath for some quality alone time in a fantasy involving Katee Sackhoff, but he's rudely interrupted when the 'Battlestar Galactica' actress talks back, reminding him that a real woman, Bernadette, awaits him.

Wolowitz eventually comes to his senses and attempts to win Bernadette back. Meanwhile, Kripke uses a bottle of helium to pull a prank on Sheldon while he appears on a talk radio show, which inspires Sheldon to plot revenge of his own.

Watch the video after the jump.On 'The Big Bang Theory,' wannabe ladies man Howard settles into a bath for some quality alone time in a fantasy involving Katee Sackhoff, but he's rudely interrupted when the 'Battlestar Galactica' actress talks back, reminding him that a real woman, Bernadette, awaits him.

Wolowitz eventually comes to his senses and attempts to win Bernadette back. Meanwhile, Kripke uses a bottle of helium to pull a prank on Sheldon while he appears on a talk radio show, which inspires Sheldon to plot revenge of his own.

Watch the video from TV's Top 5! below.