"He has a presence about him ... his talent is unbelievable," Henderson tells TVGuide.com.
In Saturday's one-hour episode (8/7c on Nickelodeon) titled "Big Time Christmas," the band is trying to head home for the holidays, but must record three new songs before they can leave. Guest-starring along with Snoop Dogg is Miranda Cosgrove and Fabio.
Henderson says viewers "are really going to enjoy seeing us get into trouble and get out of trouble."
Aside from the high jinks that Logan and bandmates James (James Maslow), Kendall (Kendall Schmidt) and Carlos (Carlos Pena) get into, "Big Time Christmas" will feature an animated song with Snoop, a remake of Mariah Carey's "All I Want For Christmas" with Cosgrove, and an original song called "Beautiful Christmas."
Off-screen, the band spent some time with the 39-year-old rapper and snapped a few pictures for one of their biggest fans — Snoop Dogg's daughter.
"He said, 'My daughter loves you guys and I have a booklet of all the people that I have snapped shots of and you guys are going in the book,'" Henderson says. "That's pretty special."
Watch an exclusive clip of Snoop Dogg on Big Time Rush: