*In the tradition of Hitchcock, Peter Deluise and Martin Wood have managed to appear in each and every single one of their episodes, but it isn't always obvious. For Peter it is often a small part with on line, but some cameos are more difficult to see. Occasionally, it's just a voice over, as simple as a "Yessir" or "Understood" over the radio. In one particular episode - I'll never tell - he "appears" only in the form of his initials, lined up as candles, reflected in a window. Martin, on the other hand, nearly always appears in a flight suit handing a ridiculously large wrench - since dubbed the "Siler Wrench" to a certain Serfeant in the background of a scene at Stargate Command. When they're doing their cameos, its(sic) strange to see one of the extras in the background shout "cut!" at the conclusion of a scene.
*Source: Back of card