Carl Weathers

Carl Weathers

Carl Weathers : Earlier in the summer, when “Psych” star James Roday talked about all of the guest stars for Season 5, he seemed most excited about an episode where he and Dulé Hill’s characters team up with their senior counterparts played by Carl Weathers (“Rocky”) and William Devane  (“24,” “Knot’s Landing”).But from the promo for the August 18 episode, “Viagra Falls,” it looks like the foursome doesn’t get off on a particularly good start. Older Shawn and Gus are sufficiently crotchety and — what’s the word? — competent.History, TV convention and our own psychic powers tells us they’ll work out their differences by approximately 10:47 p.m. ET, but if this clip is any indication, the bickering we’ll see in the first