Although it's a show about the group, inevitably there are different splits between the group, following the action in a couple if different places. Last week, for example, gave us the genius of Sara Lance pairing up with Captain Cold and Heat Wave, resulting in some great humour and a superb barroom brawl. This week, then, changed things up a bit. We had Jax, Sara, and Prof Stein going to visit the younger Martin Stein, and the Rogues going along with Ray Palmer to steal the knife. Sara was great value here for interacting with both old and young Stein, but the even better stuff was the impeccably polite and always cheery Ray Palmer having to work with Snart and Rory, in particular the former, which was fantastic. There are some really different and unique personalities in the group, and hopefully the show continues to throw together these weird mixes and see what happens.