Mystery Machine

When Gwen Cooper asked "Who ya gonna call?", (PROSE: The House That Jack Built) a popular line from Ghostbusters, (TV: Army of Ghosts) while preparing to visit a haunted house in Penylan, Jack Harkness replied "Torchwood!", before yelling "To the Mystery Machine!". Gwen sighed "Don't try and quote popular culture. You always get it wrong". (PROSE: The House That Jack Built)

The Mystery Time Machine's universe
In a parallel universe relative to the Daft Dimension, the Doctor travelled in a ship called "The Mystery Time Machine", which had similarities with the Mystery Machine. (COMIC: )

Behind the scenes

 * Although not specifically mentioned in the DWU, it was referred to in The Age of Steel, when Pete Tyler compared the Preachers to "Scooby-Doo and the gang", commenting "They've even got the van".
 * The Mystery Machine appeared as a vehicle in LEGO Dimensions.