They’ve been dipping their toes in ever since the show debuted January 6, but last night was when ABC’s Marvel’s Agent Carter (1.3/4) dove full-force into the greater Marvel Universe to what must have been fanboys’ delight. But despite an unspoken Black Widow, the roar of the Howling Commandos and a cameo from Neal McDonough as Dum Dum Dugan from the first Captain America pic and the AC Marvel One-Shot short, it still resulted in zero movement among adults 18-49. As a result, Agent Carter stayed even with last week and was third in its 9 PM time slot.

What’s all the more striking about that number is it came despite the episode being heavily promoted — as was the Daredevil sneak NEAL MCDONOUGH, HAYLEY ATWELLpeek that was shown — and unlike last week it had an original Shark Tank (1.9/6) as a lead-in. That airing of the entrepreneurial reality show had a small demo lift of 6% from its last original in the time slot on January 13. The lack of movement for Agent Carter wasn’t a pal to lead-out Forever (0.9/3): The freshman series stumbled 10% from its last new episode January 13 to hit a low in preliminary ratings.

On CBS, it was a pretty steady night for NCIS (2.6/8) and new spinoff NCIS: New Orleans (2.2/7). The former was the night’s highest-rated and most-watched show (a stunning 18.62 million viewers), down 7% from its last original January 13, while the freshman dipped 4% but still was the night’s second-most-watched show with 16.38 million watching. That’s a touch down from the average audience of 18.63 million that Nielsen is giving the show this season — a result that has the spinoff coming in as the most-watched new drama since Desperate Housewives’ debut season pulled in 23.2 million in 2004-2005. For the record and CBS’ trophy cabinet, the previous second-place show was The Mentalist, which had an average audience of 17.75 million for its first cycle in the 2008-2009 season.

Yet for all that good(ish) NCIS news last night, NCIS: NOLA still saw lead-out Person Of Interest (1.4/5) take a 17% fall from its last original January 13. Still, CBS won the first Tuesday of the February sweep in the key demo (2.1/7) and total viewers (14.73 million).

Fox also felt the pull of ratings gravity with MasterChef Junior (1.6/5) down a tenth from last week and comedies New Girl (1.4/4) and The Mindy Project (1.1/3) even with their January 27 episodes. Coming out the gate hot, the CW’s The Flash (1.3/4) has definitely slowed down as the speedy superhero show was flat with last week to tie a low among 18-49s. On the flipside, lead-out Supernatural (0.9/3) climbed out of the drop of last week to rise 29%.

It was mixed bag for NBC too with Parks And Recreation (1.2/4) falling 14% from last week to what is a final-season low in early numbers, and last place in its time slot. After a Parks And Rec encore at 8:30 PM, the rest of NBC’s night was in upward motion with Marry Me (0.9/3) and About A Boy (1.0/3) up 13% and 25%, respectively, from last week’s even and stumbling results. In fact, last night was the best Marry Me has done without having The Voice as a lead-in. Wrapping the night for NBC, Chicago Fire (1.6/5) was up 7% from its last original January 13.