Charlie Croker was Michael Caine's character's name in The Italian Job.
Jon Michel Hill and Lucy Liu work together in Elementary
Anthony Heald and Christian Clemenson previously appeared in Boston Legal (2004), where Clemenson was a regular cast member and Heald had some appearances (he plays a judge on both shows).
He asks his friends if they've ever flown on a "G5" referring to a Gulfstream. The business jet shown is definitely NOT a Gulfstream!
The business jet Croker uses is referred to as a Challenger 600 but it is a later variant like 601 or 604 (The 600 does not have winglets and the engine nacelle on the jet in the series is for a 601or later, which uses GE CF34 engines)