While watching a rerun of NCIS, Zeva (Cote de Pablo) asked Gibbs (Mark Harmon) what Ducky (Dr. Mallard played by David McCallum) looked like when he was younger. Gibbs' reply? Illya Kuryakin. I nearly fell off the couch laughing my ass off. For those of you younger members that don't remember late 60s television, the program Man From U.N.C.L.E. starred Robert Vaughn (Napoleon Solo) and David McCallum (Illya Kuryakin) as agents.
On Stargate SG-1, Major Carter (Amanda Tapping) was jerry-rigging a DHD (Dial Home Device) so they could get out of a "situation." When Colonel O'Neill came up and asked what was going on, Major Carter told him they had MacGyvered (referring to Richard Anderson's previous series years before, MacGyver) something up to get the DHD operational. Don't know if that was in the script or whether Tapping ad libbed it, but again, I laughed my ass off.