After dropping an episode last week, 'The Big Bang Theory' will air its Season 8 Episode 19 titled 'The Skywalker Incursion' on Thursday, April 2 via CBS. The upcoming episode is expected to be a hilarious one, as Leonard and Sheldon try to sneak into George Lucas' Skywalker Ranch.

TheHollywood Hills reports that the upcoming episode will focus on Sheldon and Leonard as they quietly enter the workplace of one of their idols.

A promo clip for 'The Big Bang Theory' Season 8 Episode 19' shows that Sheldon and Leonard are excited and firm on meeting their hero George Lucas.

Sheldon is seen exclaiming, "I'm so excited, and I just can't hide it!" He is sitting in the passenger seat while Leonard is driving to the ranch. However, once they reach the ranch things go awry, as Sheldon is chased by security guards with tasers.

The synopsis of 'The Skywalker Incursion,' as published by CarterMatt, reads, "When Leonard and Sheldon are invited to speak at UC Berkeley, they take a detour to try to meet an idol. Also, when Bernadette and Howard battle over the fate of his Dr. Who TARDIS, Raj and Amy offer to settle the dispute with a game of ping pong."

In the upcoming episode of 'The Big Bang Theory,' guest stars include actor Tate Ellington, who will portray the character of Mitchell, actors Michael Dempsey and Mark Barrett will feature as security guards on the ranch.

In 'The Big Bang Theory' will air its Season 8 Episode 20'  titled 'The Fortification Implementation,' which will be aired on April 9, viewers will be introduced to Howard Wolowitz's long-lost half-brother. According to Entertainment Weekly, Wolowitz's younger brother, Josh, will be played by 'Victorious' star Matt Bennett in the next episode.

Incidentally, Howard's half-brother from his father's side, Josh, comes to town unexpectedly and shows up on his doorstep. However, fans have yet to see Howard's estranged father on the series.