cnbc shark tankAfter months of tinkering with different programming and entertainment shows, CNBC may have finally found the solution to boosting its primetime ratings: airing re-runs of a popular reality show.

With “Shark Tank” Tuesday night, the network delivered its best primetime audience since 2008 in total viewers and since 2010 in A25-54 viewers. CNBC recently acquired the off-network cable rights to the hit ABC show and aired four episodes from 8pm-Midnight Tuesday.

CNBC averaged 596,000 total viewers and 299,000 A25-54 viewers from 8 to 11pmET (see how the other cable news networks did on Tuesday’s scoreboard). The 9pmET hour posted the highest numbers, tallying 685,000 total viewers and 365,000 A25-54 viewers, the most watched CNBC telecast in more than three years.

“Shark Tank,” which will air as a four-hour block Tuesday nights, features Lori Greiner, who talked about her role on the show with MediabistroTV: